Quantum Data 881 User Manual page 416

74 Chapter 12 CEC Interactive Troubleshooting Environment (ITE)
3. Enter the following command to query the log for a message with a specific opcode and
to only return specific parameter values.
CEC1:MSGX? 83 D
4. Enter the following command to query the value of a specific byte number of
parameters a message with a user specified opcode:
CEC1:MSGX? 83 P 2
5. Enter the following command to query whether one message with a user specified
opcode occurs before or after another.
CEC1:MSGX? 83 O 84 //returns order of message with opcodes specified
The response will be one of:
0 - opcode 2 occurred before opcode 1
1 - opcode 1 occurred before opcode 2
2 - opcode 1 or opcode 2 not found
3 - opcode 1 and opcode 2 not found
255 - opcode 1 is the same as opcode 2
To clear the CEC message log:
1. Enter the following command to clear the messages in the log.
CEC1:MSGC //clears the message log
You can also clear the message log with the following command:
CECU
Viewing CEC messages with the ACA
You can also log CEC messages using the Auxiliary Channel Analyzer (ACA).
digit (3) is the logical address of the sending
device (the emulated device); the opcode (84) is
the returned message code (give logical address)
//queries log for message with specified opcode
and request return of destination address
//returns value of 2nd byte of the parameters of
a message with opcode 83