Megmeet MC200-5AM Manuale utente

MC200-5AM Analog I/O Module

User Manual

To reduce the chance of accident, please carefully read the operation

instructions and notes in this book prior to use. Only adequately trained

personnel shall install or operate this product. Strict compliance with the

safety rules in relevant industries, the operation instructions and safety

precautions provided in this book is required in equipment operation.

1 Port Description

1.1 Port

The extension port and user port of MC200-5AM are both protected by a

cover, as shown in Figure 1-1. Removing the covers reveals the extension

port and user port, as shown in Figure 1-2.

POWER

24V

RUN

EC20-5AM

Extension cable

Extension port cover

User port cover

262

POWER

24V

RUN

EC20 - 5 AM

102 4 6 8 2012 14 16 18

91 3 5 7 1911 13 15 17

V2+24V-

V1+

I 1+

24V+ FG VI2-

I2+ I3+

VI3-

V4+ I4+ VO+ IO+

User port Extension port

Extension cable

VI1- V3+ VI4- VIO-

Figure 1-1 MC200-5AM appearance Figure 1-2 Module ports

The extension cable connects MC200-5AM to the system, while the

extension port connects MC200-5AM to another extension module of the

system. For details on connection, See 1.2 Connecting Into System.

The user port of MC200-5AM is described in Table 1-1.

Table 1-1 MC200-5AM user port description

Terminal

Name

Description

Terminal

Name

Description

24V+

Analog power supply

24V+

V3+

CH3 voltage input

24V-

Analog power supply

24V-

I3+

CH3 current input

Shielding ground

VI3-

CH3 common GND

Protection ground

V4+

CH4 voltage input

V1+

CH 1 voltage input

VI4-

CH4 common GND

I1+

CH 1 current input

I4+

CH4 current input

VI1-

CH1 commond GND

V2+

CH2 voltage input

VO+

Voltage output

VI2-

CH2 commnd GND

VIO-

Output channel

common GND

I2+

CH2 current input

IO+

Current output

Note: An input channel cannot receive both voltage signals and current

signals at the same time. If you intend to use a channel for current

measurement, short its voltage input terminal and current input terminal.

1.2 Connecting Into System

Through the extension cable, you can connect MC200-5AM to MC200 series

basic module or other extension modules. While through the extension port,

you can connect other MC200 series extension modules to MC200-5AM. See

Figure 1-3.

Basic module Extension module

Removing extension port cover

before connection

Extension cable

Figure 1-3 Connecting into system

1.3 Wiring

Figure 1-4 shows the wiring of the user port.

I1+ CH1

24 V+

24 V -

DC /DC

converter AGND

+5V

-5 V

PGND

EC 20 -5AM

24 Vdc ± 10%

60mA

V1+

VI 1-

AGND

250

130K

390 K

AGND

Current input

I4+ CH4

V4+

VI 4-

AGND

250

130K

390 K

AGND

Voltage input

①

②

③

①

Load CHO

IO+

VO+

VIO -

AGND

①

②

④

⑤

⑨

⑥

⑦⑧

Figure 1-4 Wiring of MC200-5AM user port

The circled 1 ~ 9 stands for the nine points to be observed during wiring.

1. It is recommended to use shielded twisted pair for the analog input and

output and separate them from power cables and any cable that may

generate EMI.

2. If the I/O signal has electric noise or voltage fluctuation, it is advisable to

connect a smoothing capacitor (0.1µF ~ 0.47µF/25V).

3. If strong EMI exists, connect the FG terminal to the PG terminal.

4. Each load of the PLC should be grounded separately．

5. If a channel is used for current input, short its voltage input terminal and

current input terminal.

6. Shorting the voltage output terminals or connecting current load to voltage

output terminals may damage MC200-5AM.

7. Properly ground the module’s PG terminal.

8. The basic module’s 24Vdc auxiliary power or other qualified external

power supply can be used as the power source of the module’s analog

circuit.

9. Do not use the NC terminal.

2 Indices

2.1 Power Supply

Table 2-1 Power supply

Item

Description

Analog circuit

24Vdc (-15%~20%), maximum allowable ripple voltage

5%, 90mA (from basic module or external power supply)

Digital circuit

5Vdc, 50mA (from basic module)

2.2 Performance

Table 2-2 Performance

Item

Index

Conversion

speed

AD conversion

15ms/channel (normal)

8ms/channel (high speed)

DA conversion

6ms/channel (max.)

Analog

input

Voltage

-10 ~ 10Vdc (input impedance 200kΩ)

Warning: this module may be damaged if

the input voltage exceeds ±15Vdc

Current

-20~20mA (input impedance 250Ω)

Warning: this module may be damaged if

the input current exceeds ±32mA

Analog

output

Voltage

-10~10Vdc (external load impedance ≥ 2kΩ)

Current

0~20mA (external load impedance ≤ 520Ω)

Digital output

Default: -2000 ~ 2000

Setting range: -10000 ~ 10000

Digital input

Default: -2000 ~ 2000

Setting range: -10000 ~ 10000

Resolution

Voltage input

5mV

Current input

10µA

Voltage output

5mV

Current output

10µA

Accuracy

Analog input

±1% of full range

Analog output

±1% of full range

Item

Index

Isolation

Between analog circuit and digital circuit:

photocoupler. Between analog circuit and input

24Vdc power: internal isolation. Between

analog channels: none

2.3 Buffer Memory

MC200-5AM exchanges data with the basic module through Buffer Memory

(BFM). The basic module uses TO command to write data into the BFM of

MC200-5AM to configure the status of MC200-5AM. It also uses TO

command to write in DA conversion input data. It uses FROM command to

read AD conversion result and other data from the BFM of MC200-5AM.

Table 2-3 describes the contents of the BFM of MC200-5AM.

Table 2-3 BFM contents

BFM

Contents

Description and default

Property

#000

CHO channel data

Output channel

#100

Average value of CH1

Input channel

#101

Average value of CH2

Input channel

#102

Average value of CH3

Input channel

#103

Average value of CH4

Input channel

#200

Current value of CH1

Input channel

#201

Current value of CH2

Input channel

#202

Current value of CH3

Input channel

#203

Current value of CH4

Input channel

#300

Module error state word

#400

Initialization

#500

Setting change enabling

1 (enabled)

#600

Input channel mode word

0x0000

#650

Output channel mode word

0x0000

#700

Average sampling times of CH1

#701

Average sampling times of CH2

#702

Average sampling times of CH3

#703

Average sampling times of CH4

#800

Input characteristic setting

confirmation

0x0000

#801

Output characteristic setting

confirmation

0x0000

#900

CHO-D0

0 (output mode 0)

#901

CHO-A0

0 (output mode 0)

#902

CHO-D1

2000 (output mode 0)

#903

CHO-A1

10000 (output mode 0)

#904

CH1-D0

0 (input mode 0)

#905

CH1-A0

0 (input mode 0)

#906

CH1-D1

2000 (input mode 0)

#907

CH1-A1

10000 (input mode 0)

#908

CH2-D0

0 (input mode 0)

#909

CH2-A0

0 (input mode 0)

#910

CH2-D1

2000 (input mode 0)

#911

CH2-A1

10000 (input mode 0)

#912

CH3-D0

0 (input mode 0)

#913

CH3-A0

0 (input mode 0)

#914

CH3-D1

2000 (input mode 0)

#915

CH3-A1

10000 (input mode 0)

#916

CH4-D0

0 (input mode 0)

#917

CH4-A0

0 (input mode 0)

#918

CH4-D1

2000 (input mode 0)

#919

CH4-A1

10000 (input mode 0)

#2000

AD conversion speed switchover

0 (15ms/CH)

#2100

Channel reset

0x0000; 1: Reset

#4000

Low word of module use time

#4001

High word of module use time

#4094

Module software version

0x1000

#4095

Module ID

0x3142

Explanation:

1. CH1 stands for channel 1; CH2, channel 2; CH3, channel 3, and so on.

2. Property explanation: R means read only. An R element cannot be written.

RW means read and write. Reading from a non-existent element will get 0.

3. Status information of BFM#300 is shown in Table 2-4.

Table 2-4 BFM#300 status information

Bit status of

BFM #300

ON (1)

OFF (0)

b0: error

b1 or b2 is ON, AD/DA conversion of

all channels stopped

No error

b1: deviation &

gain error

BFM channel characteristic

parameter abnormal or setting error

Deviation & gain

normal

b2: power

supply failure

24Vdc power supply failed

Power supply

normal

b3: hardware

fault

AD converter hardware faulty

Hardware normal

b10: digital

range error

1. Digital output after AD conversion

outside the range of -2048 ~ 2047;

2. Digital input for DA conversion

outside specified range

Digital input/output

value normal

b11: average

sampling error

Average sampling outside the range

of 1 ~ 4096 (use default 8)

Average normal

(between 1 ~ 4096)

4. BFM#400: module initialization command. Setting BFM#400 to 1 will

restore all module settings to default values.

10. BFM#500: I/O characteristics setting change enable. Setting BFM#500 to

0 inhibits change in I/O characteristics settings. Setting it to 1 allows change

in I/O characteristics settings. The setting of BFM#500 will not change after

module restart following power restoration.

3. BFM#600: input mode selection, used to set the input modes of CH1 ~

CH4. See Figure 2-1 for their correspondence.

×4

0x×3×2×1

Input mode for CH1

600#

Input mode for CH2

Input mode for CH3

Input mode for CH4

Figure 2-1 Mode setting element vs. channel

The exact meaning of the X in the channel mode is shown in Table 2-5.

Table 2-5 Meaning of X in input mode

Value of X

Information

-10V ~ +10V voltage input mode

-5V ~ 5V voltage input mode or -20 ~ 20mA current input

mode

Channel closed

For example, if #600 is written as ‘0x0103’, the setting will be like this:

Input channel 1 closed;

Input channel 3 mode: -5V ~ +5V or –20mA ~ 20mA (note the wiring

difference in voltage and current, see 1.3 wiring);

Input CH2, and CH4 mode: -10V ~ 10V.

7. BFM#650: output mode selection, controlled by the X1 in the 4-bit

hexadecimal number H×4×3×2×1. The meaning of ×is as follows:

Table 2-6 Meaning of X in output mode

Bit

Value

Information

-10V ~ +10V voltage output mode

0 ~ 20mA current output mode

4 ~ 20mA current output mode

X2~ X4

Reserved

8. BFM#700 ~ BFM#703: average sampling times setting; setting range:

1~4096. Default: 8 (normal speed); choose 1 if high speed is needed.

9. BFM#2000: AD conversion speed setting. 0: 15ms/channel (normal speed);

1: 8ms/channel (high speed). Setting BFM#2000 will restore BFM#1 ~ #2 to

the default, which should be noted in programming. If necessary, you can set

BFM#700 ~ #703 again after changing the conversion speed.

10. BFM#800, BFM#801: channel characteristics setting confirmation. After

setting the channel characteristics (from BFM#900 to BFM#919), you need to

write 1 into the corresponding hexadecimal data bit to validate the setting and

thereby change the channel’s output characteristics. This command will be

cleared automatically after being executed correctly.

11. BFM#900 ~ BFM#919: channel gain and deviation settings, which are set

using two-point method. D0 and D1 represent channel digital output, A0 and

A1 represent actual channel input. A0 and A1 are in mV or µA, and each

channel occupies 4 words. To simplify the setting operation without affecting

functions, A0 and A1 are respectively fixed to 0 and the maximum value.

Users cannot change them.

Note: If the channel input is current signal (-20mA~20mA), the present

channel mode should be set to 1. Because the channel’s internal

measurement is based on voltage signal, current signals should be converted

into voltage signals (-5V~5V) by the 250Ω resistor at the current input

terminal of the channel. The A1 in the channel’s characteristics setting is still

in mV unit, that is to say, 5000mV (20mA × 250Ω = 5000mV).

12. BFM#4094: module software version, which can be read with the FROM

command.

13. BFM#4095: module ID. ID of MC200-5AM is 0x3142. The user program in

PLC can use this ID to identify the module before transceiving data.

3 Characteristic Setting

3.1 Setting Analog Input Channel

Characteristics

The input channel characteristic of MC200-5AM is the linear relationship

between the channel’s analog input A and digital output D. It can be set by

the user. Each channel can be considered as the model shown in Figure 3-1.

As it is of linear characteristic, the channel characteristic can be defined by

just two points: P0 (A0, D0) and P1 (A1, D1), where D0 is the channel’s

digital output corresponding to analog input A0, and D1 is the channel’s

digital output corresponding to analog input A1.

Channel D

Digital output

Analog input

Channel model

A (mV)

Channel characteristic setting

A0 A1

Figure 3-1 MC200-5AM input channel characteristic

To simplify the operation process without affecting functions, A0 and A1 are

respectively fixed to 0 and the maximum value in the present mode. That is to

say, in Figure 3-1, A0 is 0 and A1 is the maximum analog input in the present

mode. A0 and A1 will change according to the mode when BFM#600 is

changed. Users cannot change their values.

If you just set the channel mode (BFM#600) without changing the D0 and D1

of each channel, the channel characteristic vs. mode should be as shown in

Figure 3-2. The A in Figure 3-2 is default.

5000

2000

- 2000

A (mV )

B. Mode 1

- 5000

10000

2000

- 2000

A ( mV )

A. Mode 0

(default)

-10000

Figure 3-2 Characteristics vs. modes without changing D0 and D1

You can change the channel characteristic by changing D0 and D1. The

setting range of D0 and D1 is –10,000 ~ 10,000. If the setting is outside this

range, MC200-5AM will not accept it, but maintain the original valid setting.

Figure 3-3 provides for your reference an example of changing channel

characteristics.

5000

2000

- 3000

0A( mV)

- 5000

10000

- 10000

0A ( mV)

-10000 P0

- 500 1000

Mode 0, D0 = 0, D1 = 10,000

Mode 1, D0 = -500, D1 = 2000

Analog input 10V outputs 10,000

Analog input 5V (or 20mA) outputs 2000

Analog input 0V outputs 0

Analog input 1V (or 4mA) outputs 0

Analog input -10V outputs -10,000

Analog input -5V (or -20mA) outputs -3000

Figure 3-3 Changing input channel characteristics

3.2 Setting Analog Output Channel

Characteristics

The analog output channel characteristic of MC200-5AM is the linear

relationship between the channel’s analog output A and digital input D. It can

be set by the user. Each channel can be considered as the model shown in

Figure 3-4. Because it is of linear characteristic, the channel characteristic

can be defined by just two points: P0 (A0, D0) and P1 (A1, D1), where D0 is

the channel’s digital input corresponding to analog output A0, and D1 is the

channel’s digital input corresponding to analog output A1.

Channel characteristic

Channel

Digital input

Analog output

Channel model

Figure 3-4 MC200-5AM output channel characteristic

To simplify the operation process without affecting functions, A0 and A1 are

respectively fixed to 0 and the maximum value in the present mode. That is to

say, in Figure 3-4, A0 is 0 and A1 is the maximum analog output in the

present mode. A0 and A1 will change according to the mode when BFM#650

is changed. Users cannot change their values.

If you set the channel mode (BFM#650) without changing D0 and D1 of each

channel, the channel characteristic vs. mode should be as shown in Figure

3-5. The A in Figure 3-5 is default.

B. Mode 1: 0 ~ 20mA

10000

2000

A. Mode 0: -10V ~ 10V

(default)

-2000

A ( mV )

- 10000

20000

2000

0- 2000

A ( uA )

20000

2000

C. Mode 2: 4-20mA

-2000

A ( uA)

- 500

4000

Figure 3-5 Characteristics vs. modes without changing D0 and D1

You can change the channel characteristic by changing D0 and D1. The

setting range of D0 and D1 is –10,000 ~ 10,000. If the setting is outside this

range, MC200-5AM will not accept it, but maintain the original valid setting.

Figure 3-6 provides for your reference an example of changing channel

characteristics.

10000

- 10000

A ( mV )

-10000

20000

2000

-2000

A ( uA )

20000

10000

0-10000

A (uA)

-2500

4000

10000

Mode 0, D0 = 0, D1 = 10,000

Mode 1, D0 = -2000, D1 =

2000

Mode 2, D0 = -2500, D1 =

10000

Input 10,000 outputs 10V

Input 2000 outputs 20mA

Input 10000 outputs 20mA

Input 0 outputs 0V

Input 0 outputs 10mA

Input 0 outputs 4mA

Input –10,000 outputs –10V

Input –2000 outputs 0mA

Input –2500 outputs 0mA

Figure 3-6 Changing output channel characteristics

4 Application Example

4.1 Basic Application

Example: The MC200-5AM module address is 1 (for the addressing of

extension modules, refer to the MC200 Series PLC User Manual). Use its

channels 1, and 3 for voltage input (-10V~10V), and CH2 for current input

(-20~20mA). Close CH4. Set the average sampling times to 4, and use data

registers D1, D2, and D3 to receive the average value; set output channel to

mode 0 and for 10V voltage output.

4.2 Changing Characteristics

Example: The MC200-5AM module address is 3 (for the addressing of

extension modules, refer to the MC200 Series PLC User Manual). Set the

average sampling times to 4. The example below can change the

characteristics as shown in Figure 3-3. To be specific, CH1 realizes A in

Figure 3-3, and CH2 realizes B. Close CH3 and CH4. Use data registers D1

and D2 to receive the average value. The output channel realizes the A

characteristic in Figure 3-6. Output voltage: 10V.

5 Operation Inspection

5.1 Routine Inspection

1. Check that the wiring of analog input meets the requirements (see 1.3

wiring).

2. Check that the extension cable of MC200-5AM is properly inserted in the

extension port.

3. Check that the 5V and 24V power supplies are not overloaded. Note: The

digital circuit is powered by the basic module through extension cable.

4. Check the application, make sure the operation method and parameter

range are correct.

5. Set the MC200 basic module to RUN state.

5.2 Inspection Upon Fault

In case of abnormality, check the following items:

●The status of the POWER indicator

ON: the extension cable is properly connected;

OFF: check the extension cable connection and the basic module.

●The wiring of analog input

●The status of the 24V indicator

ON: 24Vdc power supply normal;

OFF: 24Vdc power supply possibly faulty, or MC200-5AM faulty.

●The status of the RUN indicator

Flash quickly: MC200-5AM in normal operation;

Flash slowly or OFF: Check the information in BFM#300.

Notice

1. The warranty range is confined to the PLC only.

2. Warranty period is 18 months, within which period Megmeet Network

Power conducts free maintenance and repairing to the PLC that has any fault

or damage under the normal operation conditions.

3. The start time of warranty period is the delivery date of the product, of

which the product SN is the sole basis of judgment. PLC without a product

SN shall be regarded as out of warranty.

4. Even within 18 months, maintenance will also be charged in the following

situations:

Damages incurred to the PLC due to mis-operations, which are not

in compliance with the User Manual;

Damages incurred to the PLC due to fire, flood, abnormal voltage,

etc;

Damages incurred to the PLC due to the improper use of PLC

functions.

5. The service fee will be charged according to the actual costs. If there is any

contract, the contract prevails.

6. Please keep this paper and show this paper to the maintenance unit when

the product needs to be repaired.

7. If you have any question, please contact the distributor or our company

directly.

Shenzhen Megmeet Control Technology Co.,Ltd

Address: 5th Floor,Block B，Ziguang Information Harbor, Langshan Rd,

Science& Technology Park, Nahshan District, Shenzhen

Homepage: www.megmeet.com

without notice.

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