Installation and Configuration

Configure for Multichannel Operation

CANbus The CANbus port consists of two 4-pin modular “handset” jacks to support daisy chain connections. The CAN (Controller Area Network) is an ISO standard (ISO11898) for a serial communication network. Table 2.2 describes the pin functions. The CANbus is used for communications in multichannel operation or current sharing (master/slave) operation.

Table 2.2 CANbus Pins

Pin #

Function

1CANLO

2Ground

3CANHI

4Ground

CANbus

The custom CANbus cables shipped with your unit are parallel 4-connector cables

Cables

with 4-pin modular “handset” connectors.

Configuration

The CAN-only interface cards must be configured via the CANbus with another

of CAN-only

GPIB-M card. The CAN-only interface cards are set to multichannel address 2 at the

Interface

factory. Ensure the multichannel address on the GPIB-M is set to an unused address,

Cards

for example, address 1. Connect the two power supplies as shown in Figure 2.10,

 

“Connections for Multichannel Operation” on page 37.

 

Send the query to the CAN-only power supply:

 

SYST2:REM:SOUR?

 

and ensure the response is “MCH” for multichannel.

 

If necessary, set the power supply to accept control via multichannel commands

 

(the CANbus interface) with the SCPI command:

 

SYST2:REM:SOUR MCH

 

Set each slave's unique multichannel address using the command:

 

SYST2:COMM:MCH:ADDR <multichannel-address>

 

where multichannel-address is an integer in the range of 1-50.

 

This procedure can be repeated separately with each power supply to assign a unique

 

address to each. Once all power supplies are configured, they can be connected to the

 

CANbus network.

 

 

 

Note See “Broadcasting Commands” on page 39 for additional information on

 

configuring CAN-only units.

 

 

36

Operating Manual for Multichannel Functionality (GPIB-M)

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Xantrex Technology GPIB-M-XT, GPIB-M-XHR, GPIB-M-XPD, GPIB-M-XFR3, GPIB-M-HPD CANbus, Cables, CAN-only, Interface, Cards