INFICON RQCM - Quartz Crystal Microbalance Research System - Manual (Page 81)

RQCM – RESEARCH QUARTZ CRYSTAL MICROBALANCE
COMPUTER INTERFACE 7-5
Length=2
Instruction Code
Receive code
Checksum
A value of 253 for the instruction byte indicates that this is a received status message. The
Instruction Code byte indicates the instruction code of the message that was received. The
following table shows a list of possible receive codes:
Receive Code Description
0 Message received O.K.
1 Invalid checksum.
2 Invalid instruction code.
3 Invalid message length.
4 Parameter(s) out of range.
5 Invalid message.
7.11 INSTRUCTION SUMMARY
The following table is a list of valid instruction codes.
Instruction Code Description
0 Send RQCM configuration
1 Initiate automatic data logging of binary values
2 Set analog to digital board configuration
3 Internal command
4 Internal command
5 Internal command
6 Set Relay Outputs
7 Internal command
8 Set interface address
7.12 INSTRUCTION DESCRIPTIONS
The following is a description of the valid instructions along with an example of how they are
used. All the examples assume the device address is 1.