LeCroy 2132 Manuale utente

OPERATOR'S MANUAL

MODEL 2132

HIGH VOLTAGE TO

CAMAC INTERFACE

Corporate Headquarters

700 Chestnut Ridge Road

Chestnut Ridge, NY 10977-6499

Tel: (914) 578-6013 Fax: (914) 578-5984

European Headquarters

2, rue du Pre-de-la-Fontaine

P.O. Box 341

CH-1217 Meyrin 1 Geneva

Switzerland

Tel: (022) 719 2228 Fax: (022) 719 2230

publication supersedes all earlier versions.

Innovators in Instrumentation

TABLE OF CONTENTS

1. General Information

Purpose 5

Unpacking & Inspection 5

Warranty 5

Product Assistance 5

Maintenance Agreements 5

Documentation Discrepancies 6

Software Licensing Agreement 6

Service Procedure 6

2. Product Description

Introduction 7

Front-Panel Description 10

CAMAC Operation 10

3. Operating Instruction

Programming for the HV4032A 13

Programming for the System 1440 15

Transmitting to System 1440 16

Responding from System 1440 16

Summary of CAMAC Functions 17

4. Specifications and Schematics 25

GENERAL INFORMATION

PURPOSE This manual is intended to provide instruction regarding the setup and

operation of the covered instruments. In addition, it describes the theory

of operation and presents other information regarding its functioning and

application.

UNPACKING AND

INSPECTION It is recommended that the shipment be thoroughly inspected immedi-

ately upon delivery. All material in the container should be checked

against the enclosed Packing List and shortages reported promptly.

If the shipment is damaged in any way, please notify the Customer

Service Department or the local field service office. If the damage is

due to mishandling during shipment, you may be requested to assist in

contacting the carrier in filing a damage claim.

WARRANTY LeCroy warrants its instrument products to operate within specifications

under normal use and service for a period of one year from the date of

shipment. Component products, replacement parts, and repairs are

warranted for 90 days. This warranty extends only to the originalpur-

chaser. Software is thoroughly tested, but is supplied "as is" with no

warranty of any kind covering detailed performance. Accessory products

not manufactured by LeCroy are covered by the original equipment

manufacturers' warranty only.

In exercising this warranty, LeCroy will repair or, at its option, replace any

product returned to the Customer Service Department or an

authorized service facility within the warranty period, provided that the

warrantor's examination discloses that the product is defective due to

workmanship or materials and has not been caused by misuse, neglect,

accident or abnormal conditions or operations.

The purchaser is responsible for the transportation and insurance

charges arising from the return of products to the servicing facility.

LeCroy will return all in-warranty products with transportation prepaid.

This warranty is in lieu of all other warranties, express or implied, includ-

ing but not limited to any implied warranty of merchantability, fitness, or

adequacy for any particular purpose or use. LeCroy shall not be liable

for any special, incidental, or consequential damages, whether incon-

tract, or otherwise.

PRODUCT ASSISTANCE Answers to questions concerning installation, calibration, and use of

LeCroy equipment are available from the Customer Service Department,

700 Chestnut Ridge Road, Chestnut Ridge, New York, 10977-6499,

(914) 578-6030.

MAINTENANCE

AGREEMENTS LeCroy offers a selection of customer support services. For example,

Maintenance Agreements provide extended warranty that allows the

customer to budget maintenance costs after the initial warranty has

expired. Other services such as installation, training, on-site repair, and

addition of engineering improvements are available through specific

Supplemental Support Agreements. Please contact the Customer

Service Department for more information.

DOCUMENTATION

DISCREPANCIES LeCroy is committed to providing state-of-the-art instrumentation and is

continually refining and improving the performance of its products. While

physical modifications can be implemented quite rapidly, the corrected

documentation frequently requires more time to produce. Consequently,

this manual may not agree in every detail with the accompanying product

and the schematics in the Service Documentation. There may be small

discrepancies in the values of components for the purposes of pulse

shape, timing, offset, etc., and, occasionally, minor logic changes.

Where any such inconsistencies exist, please be assured that the unit is

correct and incorporates the most up-to-date circuitry.

SOFTWARE LICENSING

AGREEMENT Software products are licensed for a single machine. Under this license

you may:

■Copy the software for backup or modification purposes in support of

your use of the software on a single machine.

■Modify the software and/or merge it into another program for your

use on a single machine.

■Transfer the software and the license to another party if the other

party accepts the terms of this agreement and you relinquish all

copies, whether in printed or machine readable form, including all

modified or merged versions.

SERVICE PROCEDURE Products requiring maintenance should be returned to the Customer

Service Department or authorized service facility. If under warranty,

LeCroy will repair or replace the product at no charge. The purchaser is

only responsible for the transportation charges arising from return of the

goods to the service facility. For all LeCroy products in need of repair

after the warranty period, the customer must provide a Purchase Order

Number before any inoperative equipment can be repaired or replaced.

The customer will be billed for the parts and labor for the repair as well

as for shipping. All products returned for repair should be identified by

the model and serial numbers and include a description of the defect or

failure, name and phone number of the user. In the case of products

returned, a Return Authorization Number is required and may be

obtained by contacting the Customer Service Department at (914) 578-

6030.

PRODUCT DESCRIPTION

INTRODUCTION The LeCroy Model 2132 is a single-width CAMAC module used to allow

bi-directional communication between the CAMAC Dataway and the

System 1440 or HV4032 or HV4032A mainframes. Please note however,

that the 2132 should be used with the 1440 system or the HV4032

system. It cannot be used with both systems at once. Any combination of

the HV4032 series mainframe may be used in the daisy chain. The

system employs a five pair 20 mA current loop serial bus. Data are

transmitted at 2400 BAUD using a modified ASCII code. Sixteen bit data

words are transmitted as three bytes, each with its own parity bit. Checks

for data transmission errors (parity) are accommodated by firmware at

the addressed high voltage chassis or by hardware at the 2132.

The bus consists of two serial data pairs, two bus priority pairs and one

pair to differentiate between CAMAC and TTY operation. A cable of up to

1000 feet maybe reliably employed between the 2132 and the first HV

chassis. Up to 100 feet between chassis’ may also be employed.

Using the 2132, all front panel operations can be performed remotely

(high voltage hardware limit and HV gate are excluded). Commands are

available to turn on, turn off, set and read voltage of any one channel or

all channels in any one HV mainframe.

Because CAMAC is so much faster than the serial bus, 40 word memo-

ries are employed to buffer both the R and W lines. This allows the user

to initiate a read only after all data are transferred, thus minimizing the

dead time of the attendant computer. Completion of a routine data

transfer to the 2132 sets a low priority LAM (L2) (HV4032A only). Error

signaling uses a high priority LAM (L1). These LAMs may be detected by

CAMAC Look-at-Me and identified through the CAMAC Read (R1 = L1,

R2 = L2). A front-panel ERROR output is clamped to ground (open

collector 300 mA sink) when any mainframe reports an error via the

serial bus allowing the user to trigger an external alarm.

The response time of the HV mainframes depends upon the specific

command issued. "Read One Voltage” commands require only a few

msec in contrast with “Turn HV On”, which requires approximately 20

seconds. For this reason, a Finished Response is returned after HV4032

has accomplished the task. Although this response can be disabled, it is

strongly recommended that this feature be used

Communications between the CAMAC 2132 and the HV4032 main-

frames are of several types. All communication from the 2132 to the

HV4032 will be called COMMANDS, and all communication from the HV

mainframes to the 2132 will be called RESPONSES. The HV mainframes

will spontaneously respond to indicate a failed channel. Otherwise, the

HV mainframes will respond only after receipt of a COMMAND from the

2132.

Conversely, most valid COMMANDS from the 2132 will be acknowledged

by a RESPONSE from the addressed mainframe. Those commands

having a defined response are called HANDSHAKE COMMANDS. These

are outlined in Figure 1.

Any non-handshake command can generate a Finished response (user’s

option) for convenience of operation.

CAMAC COMMAND WORDS

INITIATING

COMMAND

–

T=3 or T=4

–

T=9

–

T=8 or 10

–

T=9(6)

–

T=15

–

T=1,5,6 or 14

–

Any

–

Any

–

Any

WORD(2)

C-M-0

V-1

X-M-2

C-M-3

V-3

X-M-4

S-M-5(9)

C-M-6

X-M-7(3)

C-M-8

V-8

X-M-9

C-M-9

X-M-10

P-10

S-M-11(9)

X-M-11

N-M-12

X-M-12

N-M-13

X-M-13

C-M-14

M-M-14(10)

X-M-15

X-X-15

TYPE(1)

Command

Response

Command

Response

Command

Response

Command

Response

Command

Response

Command

Response

Command

Response

Command

Response

Command

Response

Command

Response

RESULTING

RESPONSE

None (HV4032A waiting

for T= 1 command)

T=11(8)

None (HV4032A waiting

for N V=1 commands

where N+ total number

of 3.3 kV channels and

empty channels.)

T=3

–

32 T=3 words(4)

T=11(8)

–

T=11(8)

None (HV4032A waiting

for a T=1 command)

T=8

–

T=9 and 5(5)

–

32 T=8 words(7)

–

None

–

None (HV4032A waiting

for a T=1 command)

–

None (HV4032A waiting

for X V-1 commands,

where X=number of

7 kV channels.

–

T=11(8)

–

T=10

–

DESCRIPTION

Modify one channel voltage (Chan/Mainframe)

Set values(12). Must follow a T=0, T=2, T=7,

or T=12

Modify all 3.3 kV channel voltage (Mainframe

select)

Read true voltage of addressed channel

True voltage (actual rear panel output in volts)

Read true voltage of all 32 channels

HV ON/OFF Switch(9)

HV ON/OFF Status(9)

Restore addressed channel

Preset all 3.3 kV channel (Mainframe select)

if high voltage is off

Read demand value of addressed channel

Demand value (in volts)

Status request

Failed channel response(11)

Read demand value of all 32 channels

Response Identifying Pod complement

ENABLE/DISABLE finished (T=11) response

Finished response

Preset all 7 kV channels. N indicates voltage

(N=0) or current (N=1).

Parity error (HV4032A Receiver)

Set individual voltage or current demands for

all 7 kV channels. N indicates voltage (N=0) or

current (N=1).

Overwrite error (HV4032A receiver)

Zero addressed channel

Report of "Trip" condition (HV4032A only)

Identify pod complement

Transmission error (2132 receiver)

Figure 1

Footnotes

(1) Command is a word transfer from the 2132 to the HV4032A. Response is a word or block of words transferred from the

HV4032A to the 2132. It is always accompanied by one L2 (following the last word transferred if in a block).

(2) C = Channel address. CAMAC W16 to W11 for commands, R16 to R11 for responses.

X = Don’t care. CAMAC W16 to W11 for commands, R16 to R11 for responses.

S = Switch, W11 (where W16 to W12 should be 0) for commands, R11 (where R16 to R12 are don’t cares) for responses.

W11 or R11 equal to “1” is ON, equal to “0” is OFF.

M = Mainframe address, CAMAC W10 to W5 for commands, R10 to R5 for responses (addresses 0 to 63 possible for

HV4032, 0 to 16 must be used for the HV4032A, there should be no more than 16 mainframes per 2132).

V = Voltage, CAMAC W16 to W5 for commands, R16 to R5 for responses (0-4095 possible, HV4032Alimits at 3300

for 3.3 kV pods and 3500 counts for 7 kV pods).

P = Pod type, 1 for 7 kV and 0 for 3.3 kV. Bit 27corresponds to pod 0; bit2 for pod 7.0

0-15 = Tag (T), CAMAC W4 to W1 for commands, R4 to R1 for responses.

(3) HV must be OFF for command to be accepted.

(4) Expect 32 true voltages (actual rear panel output), channel 0 first, etc. with L2 on last (channel 32) data word only.

(5) Expect one T=9 word, no L2, for each failed channel in the module, followed by T=5 with an L2.

(6) Also can be transferred spontaneously at time of failure with an L2 and the high priority L1.

(7) Expect 32 demand values, channel 0 first, etc., with L2 on last data word only.

(8) Can be enabled or disabled by T=11 command.

(9) Status bits indicates:

20= HV ON(1) / HV OFF(0)

21= Calibrate(1) / Regulate(0)

22= idle down(1) / Normal (0)

23 and 24unused.

(10) Spontaneous transfer due to panic off or interlocking being asserted with L2 and the high priority L1.

(11) Failed channel responses are possible from channels 0 to 31. The 2 bit of C is set to indicate the initiator of a trip sequence.

(12) For 7 kV pods, the values entered and read through CAMAC correspond to the voltage or current according to: (CAMAC

voltage value) = (Actual/2); (CAMAC current value) = (Actual x8).

FRONT PANEL

DESCRIPTION Two LEMO type connectors are provided on the front panel of the Model

2132 (see Figure 2). DISABLE is an external inhibit of the low priority

LAM (L2). This eliminates computer overhead for routine HV mainte-

nance at critical times.

ERROR is an open collector 300 mA clamp to ground when a failure is

detected at an HV4032. It is intended for use with an external alarm.

Maximum V CC is 30 V.

The Serial I/O connector is an Amp Model 201298-1. It is compatible with

the HVDC-14 (AMP 201297-1).

A LED on the front panel illuminate each time the 2132 is addressed.

Figure 2

CAMAC OPERATION The Model 2132 is a dual port device, communication with the HV

mainframes serial daisy chain via a Universal Asynchronous Receiver

Transmitter (UART) and with CAMAC via Dataway. Data words written

into the 2132 from CAMAC are loaded into a 40-word deep FIFO and are

available for CAMAC read out (Figure 3). Full buffering of both ports has

been provided to allow efficient operation in spite of the drastic difference

between the speed of the serial daisy chain and that of the computer.

Two levels of interrupt are employed by the 2132 system: High Priority

(L1) and Low Priority (L2) LAMs (HV4032 only). The Low Priority LAM is

used to indicate completion of data transmission from the HV4032 to the

2132 Interface. The L2 may be defeated by a TTY clamp-to-ground at

the front panel DISABLE Input. In this way, routine responses from the

HV4032s may be masked off when a LAM would be inconvenient. For

N: LED indicates that 2132 has been addressed.

DISABLE: A clamp-to-ground inhibits Q and low priority

LAM (L2) responses.

ERROR: An open collector 300 mA clamp-to-ground when

a failure is detected from an HV4032A. Intended for use

with an external alarm. Maximum Vcc is 30 V. System 1440

does not report errors through this line.

SERIAL I/O: Connector is compatible with HVDC-14 cable

for use with 4032A or AD/CAM cable used with System

1440.

Indice

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