Kurt J. Lesker 979 Series, Operation And Maintenance Manual

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Series 979 ATV Transducer 25
RS-485 Command Set
The query and command formats shown in this section are examples; the
values may vary for the user’s installation.
Set Up Commands
Active Filament – AF
The AF command returns which of the Hot Cathode sensor’s two filaments is
active, or selects between the sensor’s two filaments. Related commands:
Filament Status – FS and Transducer Status – T ( Status Commands
section); Filament Power – FP ( Pressure Measurement and Degas
Commands section). See the Maintenance and Troubleshooting section
for information on filaments.
Values: 1, 2 (default: 1)
Query: @001AF?;FF
Query Response: @001ACK2;FF
Command: @001AF!2;FF
Command Response: @001ACK2;FF
If a different filament is selected while the filament is on, the
filament power will turn off. If the control set point is enabled
(see ENC) it will need to be disabled to turn the filament power
back on. e.g. @001AF!2;FF, @001ENC!OFF;FF, @001FP!ON;FF,
@001ENC!ON;FF
Address – AD
The AD command returns or sets the 979 address. NOTE: If multiple devices
are installed on the system, an address query using 254 (shown in the query
example below) cannot determine the address of only one of the devices.
Values: 001 to 253 (default: 253)
Query: @254AD?;FF
Query Response: @001ACK001;FF
Command: @001AD!002;FF
Command Response: @002ACK002;FF