Series EJ, ET, EY, FJ & FR
102002-177 Rev M2
45
\1020\02177M2.doc 17 Jun 2019
COMMAND STRUCTURE
The general operation of the data link is described in this section.
The Customer computer can send three possible commands to the HV power
supply:
SET POWER SUPPLY (S) command
QUERY POWER SUPPLY (Q) command
SOFTWARE VERSION LEVEL REQUEST (V) command
A Set command contains a total of 18 bytes and instructs the power supply to change
any or all of its control signals. The power supply will execute the Set command and
respond with a simple 2 byte ACKNOWLEDGE (A) packet, or, if errors are
detected, the power supply will not execute the Set command but will return a 5 byte
ERROR (E) packet.
A Query command contains a total of 5 bytes, and is used to request that the power
supply return an information packet containing the analog and digital information
that it monitors. The power supply responds by sending back a 16 byte RESPONSE
(R ) packet.
In response to a 5 byte Version Request command, the power supply will return a 6
byte SOFTWARE VERSION LEVEL RESPONSE (B) packet to the computer.
For all these commands, if communication errors or illegal conditions are detected
by the power supply, the command will not be executed and the appropriate 5 byte
ERROR (E) packet will be sent back to the computer.
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