INFICON RQCM - Quartz Crystal Microbalance Research System - Manual (Page 85)

RQCM – RESEARCH QUARTZ CRYSTAL MICROBALANCE
COMPUTER INTERFACE 7-9
8. Internal Command
9. Set RQCM Interface Address (Code #8)
This instruction allows the computer to set the RQCM’s interface address. The RQCM’s
interface address allows for multiple instruments to share the same communications bus. You
can have multiple RQCM’s on the same bus but each must have a unique interface address so the
computer can communicate with each one individually.
The interface address can range from 1 to 32. All RQCM’s are shipped with the interface address
set to one.
For example: To set the RQCM’s interface address to 2, the computer would send:
Chr$(255)+Chr$(254)+Chr$(1)+Chr$(8)+Chr$(1)+Chr$(2)+Chr$(244)
If using the IEEE interface then the computer must also send a device clear before the new
interface address takes affect. The new interface address will take affect immediately when using
either RS-232 or RS-485.