Mitsubishi Electric Procon MOD-IP/50 Manuale utente

Procon

MOD-IP/50

Installation

and

User Guide

MITSUBISHI ELEC

TRIC

The Procon MOD-IP/50 unit allows a Modbus building management

system (BMS) to monitor and control air-conditioning units attached to a

Mitsubishi G-50A, GB-50A or AG-150 central controller (referred to as

‘G-50’ from now on).

The Modbus registers can be accessed via the serial comms

interface using Modbus RTU on RS232 or RS485, or via the network

interface using Modbus/TCP.

Depending on the air-conditioning configuration within the G-50, up to

50 groups can be monitored / controlled. The error state of up to 50

OC/BC units can also be monitored.

1. Product Overview

RS232/RS485

Procon

MOD-IP/50

G-50A

Outdoor

Units

Indoor Units

Modbus

BMS

System

Cat-5 ‘crossover’

cable

Serial Comms

cable

(Not supplied)

Fig.1a

System Configuration

Example Using

RS232/RS485

Modbus / TCP

Procon

MOD-IP/50

G-50A

Ethernet

Hub / Switch

Outdoor

Units

Indoor Units

Modbus

BMS

System

Fig.1b

System Configuration

Example Using

Modbus/TCP

1.1 Supplied Parts

No. Part Name Quantity

1 Procon MOD-IP/50 1

2 Cat-5 ‘Straight Through’ Patch Lead 1

3 Cat-5 ‘Crossover’ Patch Lead 1

4 Din-Rail Clips 2

5 Self-Tapping Screws for Din-Rail Clips 4

6 Installation Manual 1

2.1 Ethernet

The Procon MOD-IP/50 is a 10Base-T half duplex device and needs

to be connected to the G-50 and the local network (if Modbus/TCP is

being used). Fig.1b shows the use of a hub / switch ( not supplied ) to

make the connections, but the Procon unit and the G-50 could just as

easily be connected directly to the network.

See Appendix C for port configuration.

12/24v AC

10Base-T

Ethernet

Serial Comms

Port

Reset

Button

Power

Supply

Enable

Link

Ethernet

RS485-B RS232 Tx

Common

RS232 Rx

N/C

Can also be used to

upgrade the

firmware

RS485-A

2. Connection Details

Fig.2 Connection Details

All electrical work should be carried out by a competent person

and wiring must be in accordance with the national electrical

installation regulations.

Note: a) The Procon MOD-IP/50 and the G-50 require separate

IP addresses which must be on the same subnet.

b) The MOD-IP/50 does not support Auto-Negotiation.

2.2 Serial Comms Port

This connector provides access to the modbus registers using RS232

or 2-wire RS485. The RS232 port can also be used for upgrading the

firmware. See Appendix C for port configuration.

The RS485 interface can be used on a compatible serial

communications network shared by multiple RS485 devices. The

Slave Address Offset parameter must be set to prevent multiple units

using the same slave numbers.

It is recommended that screened twisted-pair cable is used.

RS485-A is the non-inverting signal and is also named RS485+

RS485-B is the inverting signal and is also named RS485-

Common should be connected to the cable screen.

Serial Comms

Port

Pin 5

Pin 3

Pin 2

To PC

Comm Port

9 PIN D

SUB FEMALE

Fig.3a RS232 Comms Lead Wiring Diagram

Serial Comms

Port

RS485-B

RS485-A

RS485

network

Common

Fig.3b RS485 Comms Wiring Diagram

2.3 Enable Link

Allows a normally-closed volt-free contact to set or reset the ‘Forced-

Off’ feature in the G-50. While the ‘Forced-Off’ feature is enabled, all

air-conditioning units are switched off and all remote-controllers are

disabled.

Upon detection of the open contact, the Procon unit sends the

‘Forced-Off’ Set command to the G-50, and resends at 5 seconds

intervals while the contact is open.

As soon as the contact closes, the Procon unit sends the ‘Forced-Off’

Reset command to the G-50 once only. This ensures that any

subsequent ‘Forced-Off’ commands sent via the Modbus BMS

system are not overridden.

2.4 Power Supply

The Procon MOD-IP/50 will accept either 12v or 24v AC and has a

consumption of 8VA. The unit is shipped setup for 24v AC. The

internal fuse is rated T500mA.

THIS EQUIPMENT MUST BE EARTHED

24v

Disconnect the supply and remove the top cover. Fit the 2 shorting

links and the fuse in the appropriate positions detailed above.

Shorting

Links

Fuse

Changing The Supply Voltage

Note: The Procon MOD-IP/50 comes supplied with a wire

link across the Enable Link terminals.

3. Air-Conditioning Group Configuration

The groupings set up in the G-50 determine which unit addresses

can accept commands from the BACnet BMS system. The group

number is defined as ‘the lowest indoor unit address within the

group’. This then becomes the ‘master’ address for the group, and is

the only address within that group than can accept commands.

The other units within a group can be classed as ‘slave’ units and

contain the same status parameter values as the ‘master’, apart from

the Error Code, which is unique to each unit.

In the example above, addresses 01, 03, 06 and 08 are the

‘master’ units, and 02, 04, 05 and 07 are the ‘slave’ units.

G-50

Group

M-NET

Fig.4 Grouping Example

Note: Attempting to write a command to a ‘slave’ unit will have no

effect.

4. Unit Operation

At startup and provided a network cable is attached (the ‘Ethernet

Link’ led should be lit), the Procon unit attempts to establish a

connection with the G-50 using the appropriate IP address. Should the

G-50 not be found, then a ‘watchdog’ feature will periodically reset the

Procon unit, indicated by the ‘Device Reset’ led lighting up for 2

seconds.

Once established, the G-50 is interrogated to determine the number

of active groups. At this point the Procon unit begins its polling

sequence, requesting the Mnet status, the status of all active groups,

and the list of all current alarms. This sequence is continually repeated,

with new control settings from the BMS transmitted to the G-50 by

interleaving into the poll sequence.

If the BMS is using RS232 or RS485 and provided a valid modbus

message is received, then the ‘Serial Tx’ led will light to indicate that a

Modbus reply has been sent. If Modbus/TCP is being used then there

will be increased activity from the ‘Ethernet Tx’ led.

The Global parameter ‘G50 Comms Status’ can be read via Modbus

to determine if the Procon unit is communicating with the G-50.

The time required to complete the polling sequence will depend on

the number of active groups programmed in the G-50 and the

frequency of new control settings sent via Modbus.

5. Modbus Registers

The Procon MOD-IP/50 behaves as 20 modbus slaves, each with 60 registers

(Offset = 0 to 59).

By default the slave addresses are 1 – 20 but an address offset can be

applied to provide ranges 21-40, 41-60, 61-80, 81-100, up to 201-220.

This is useful to prevent address clashing when the Procon unit is attached to

a communications network containing multiple Modbus devices.

The Procon MOD-IP/50 maps the data from the air conditioner units into

Modbus registers accessed by two Modbus parameters ‘Slave No.’ and

‘Offset’.

All slave numbers referred to in this document assume the default

addresses - Add the ‘offset’ value where applicable.

Slaves 1 to 16 each represent 3 units, and slave 17 represents 2 units, with

‘Unit C’ of slave 17 used for various system settings. See Section 5.4 for

details.

Each slave is organised as follows:

General Information Extended Information

Unit A Unit B Unit C Unit A Unit B Unit C

Offset 0 Offset 10 Offset 20 Offset 30 Offset 40 Offset 50

Examples : 1) To read the current fan speed of unit 8, the required modbus

message would contain Slave 3, Function 3, Offset 14.

2) To read the current mode of unit 48, the required modbus

message would contain Slave 16, Function 3, Offset 23.

General Information for a single unit

0 Return Air Temp

1 Error Code

2 Setpoint (Read)

3 Mode (Read)

4 Fan Speed (Read)

5 Setpoint (Write)

6 Mode (Write)

7 Fan Speed (Write)

8 On/Off (Read)

9 On/Off (Write)

Extended Information for a single unit

0 Air Direction (Read)

1 Air Direction (Write)

2 Inhibit (Read)

3 Inhibit (Write)

4 Ventilation (Read)

5 Ventilation (Write)

6 Filter Reset (Read)

7 Filter Reset (Write)

8 Unused

9 Unused

On/Off, Inhibit & Filter Reset can also be accessed via ‘Coils’. Each slave

contains 18 coils, organised as follows:

Coil Offset Definition

0 Unit A On/Off (R)

1 Unit A On/Off (W)

2 Unit B On/Off (R)

3 Unit B On/Off (W)

4 Unit C On/Off (R)

5 Unit C On/Off (W)

6 Unit A Inhibit (R)

7 Unit A Inhibit (W)

8 Unit B Inhibit (R)

9 Unit B Inhibit (W)

10 Unit C Inhibit (R)

11 Unit C Inhibit (W)

12 Unit A Filter Reset (R)

13 Unit A Filter Reset (W)

14 Unit B Filter Reset (R)

15 Unit B Filter Reset (W)

16 Unit C Filter Reset (R)

17 Unit C Filter Reset (W)

5.1 OC/BC Error Codes

Slave 18 contains the error codes for units 51 to 80.

Slave 19 contains the error codes for units 81 to 100.

5.2 Additional Register Usage

Slave Offset Setting

17 20 Mnet Status

17 21 G-50 Status

17 22 Global Forced-Off (Read)

17 23 Global Forced-Off (Write)

19 20 Firmware Number

19 21 Firmware Version

19 22-27 MAC Address

20 7-10 IP Address

20 11-14 Gateway Address

20 15-18 Subnet Mask

20 20 Slave Address Offset

20 21 G-50 IP Address

5.3 Parameter Settings

Parameter Settings Notes

Return Air Temperature 0oC to 99oC

Error Code 4 digit error code where

8000 = ‘No Error’

Setpoint Temperature Air Conditioner :

Cool/Dry : 19oC to 30oC

Heat : 17oC to 28oC

Auto : 19oC to 28oC

Boiler :

Heating : 30oC to 45oC

Heating ECO : 30oC to 45oC

Hot Water : 30oC to 70oC

Anti-Freeze : 10oC to 45oC

Cooling : 10oC to 30oC

Operation Mode 00: Fan (Draft)

01: Cool

02: Heat

03: Dry

04: Auto

05: (Not Used)

06: AutoCool

07: AutoHeat

Not settable

08: Heat Recovery

09: LC_Auto

10: Bypass

Lossnay Only

11: Heating

12: Eco-Heating

13: Hot-Water

14: Anti-Freeze

15: Cooling

Heat-pump boiler only

Fan Speed 00: Low

01: Mid2 (Low Medium)

02: Mid1 (High Medium)

03: High

On/Off 00: Off

01: On

Air Direction 00: Horizontal

01: Mid1

02: Mid2

03: Vertical

04: Swing

Local Inhibit 00: Not inhibited

01: Inhibited

Ventilation 00: Off

01: Low

02: High

Lossnay / OA units only

Filter Sign 00: Filter Sign Off

01: Filter Sign On

Cleared by writing 00 to

the Filter Sign register or

coil.

Parameter Settings Notes

OC / BC Error Code 4 digit error code where

8000 = ‘No Error’

Mnet Status 00: Initialising

01: OK

See Appendix D

G50 Comms State 00: Not found

01: OK

See Appendix D

Global Forced-Off 00: Disabled

01: Enabled

See Appendix D

5.4 Modbus Table Overview

Coil Base Offsets

Unit Address Slave General Info

Base Offset

Extended Info

Base Offset On/Off Inhibit Filter Sign

1 1 0 30 0 6 12

2 1 10 40 2 8 14

3 1 20 50 4 10 16

4 2 0 30 0 6 12

5 2 10 40 2 8 14

6 2 20 50 4 10 16

7 3 0 30 0 6 12

8 3 10 40 2 8 14

9 3 20 50 4 10 16

10 4 0 30 0 6 12

11 4 10 40 2 8 14

12 4 20 50 4 10 16

13 5 0 30 0 6 12

14 5 10 40 2 8 14

15 5 20 50 4 10 16

16 6 0 30 0 6 12

17 6 10 40 2 8 14

18 6 20 50 4 10 16

19 7 0 30 0 6 12

20 7 10 40 2 8 14

21 7 20 50 4 10 16

22 8 0 30 0 6 12

23 8 10 40 2 8 14

24 8 20 50 4 10 16

25 9 0 30 0 6 12

26 9 10 40 2 8 14

27 9 20 50 4 10 16

28 10 0 30 0 6 12

29 10 10 40 2 8 14

30 10 20 50 4 10 16

31 11 0 30 0 6 12

32 11 10 40 2 8 14

33 11 20 50 4 10 16

34 12 0 30 0 6 12

35 12 10 40 2 8 14

36 12 20 50 4 10 16

37 13 0 30 0 6 12

38 13 10 40 2 8 14

39 13 20 50 4 10 16

40 14 0 30 0 6 12

41 14 10 40 2 8 14

42 14 20 50 4 10 16

43 15 0 30 0 6 12

44 15 10 40 2 8 14

45 15 20 50 4 10 16

46 16 0 30 0 6 12

47 16 10 40 2 8 14

48 16 20 50 4 10 16

49 17 0 30 0 6 12

50 17 10 40 2 8 14

6. Special Functions

This section describes functions which can only be enabled via switches on

the MOD-IP/50 circuit board.

6.1 Function Descriptions

Bank A-1: Auto-Detail

Off: Mode status reported as ‘Auto’, regardless of

which ‘Auto’ mode is active.

On: ‘AutoHeat’ or ‘AutoCool’ are reported, if active.

( This is the factory default setting ).

Bank A-2: Not used at present.

Bank A

1: Auto-Detail

2: Unused.

Off

Disconnect the supply before removing the top cover

Fig.5 Special Function Switches

Appendix A : Physical Dimensions

144mm

104mm

34mm

10Base-T

Ethernet

Serial Comms

Port

Reset

Button

Power

Supply

Enable

Link

Fig.6 Dimensions

The holes marked ‘A’ should be used when mounting the enclosure

on a back panel.

The holes marked ‘B’ can be used to attach the supplied din-rail

clips.

Appendix B : Reset Button

The Reset button has 2 functions :

1) To restore various internal settings to their factory defaults,

2) To force the unit into ‘bootloader’ mode ready for a firmware update.

Function 1 – Restore Factory Defaults

There are 2 levels to this function.

Level 1 : With the unit already ON, press and hold in the reset button.

After approximately 5 seconds the ‘Device Reset’ light will start

to flash slowly. Releasing the reset button while the light is

flashing slowly will activate Level 1, and then reset the unit.

Settings Restored: None

Level 2 : With the unit already ON, press and hold in the reset button.

After approximately 5 seconds the ‘Device Reset’ light will start

to flash slowly. Continue to hold in the reset button until the

light starts to flash rapidly. Releasing the reset button while the

light is flashing rapidly will activate Level 2, and then reset the

unit.

Settings Restored:

IP Address 192.168.1.11

Gateway Address 192.168.1.11

Subnet Mask 255.255.255.0

G50 IP Address 192.168.1.1

Slave Address Offset 0

Function 2 – Enable ‘Bootloader’ Mode

Bootloader mode allows the firmware to be updated from a PC.

Press and hold in the reset button while powering up the unit. Continue to

hold in the reset button for approx. 5 seconds, until the ‘Device Reset’ light

begins to flash ( Long ON, Short OFF ). The unit is now in bootloader mode.

Note: Enabling the bootloader in this way is only necessary if the

firmware update software fails to automatically put the unit into

bootloader mode.

Appendix C : Port Configurations

RS232/RS485 interface

- Modbus RTU

- 9600 baud, 8 data bits, no parity, 1 stop bit

Network interface

- Modbus/TCP

- TCP port 502

- 10base-T half-duplex

- Auto-negotiation not supported

Modbus Functions accepted

- Fn 1 Read Coils

- Fn 3 Read Holding Registers

- Fn 5 Write Single Coil

- Fn 6 Write Single Register

- Fn 16 Write Multiple Registers

Appendix D : Global Parameters

Global Parameter Description

Mnet Comms Status Provides an indication of the communication status

between the G-50 and the Mitsubishi M-Net network.

00 : M-Net Initialising

01 : M-Net OK

Note: While M-Net is initialising, the air-conditioning is

effectively offline to control and monitoring

requests.

G50 Comms Status Provides an indication of the communication status

between the Procon MOD-IP/50 and the G-50.

00 : G-50 not responding

01 : G-50 comms OK

Note: ‘G-50 not responding’ either means the G-50 is

switched off or is not connected to the network.

Global Forced Off Enables and disables the Global Forced-Off command.

This setting allows the BMS to provide functionality

equivalent to the ‘Enable Link’ described in section 2.3

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