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INFICON RQCM - Quartz Crystal Microbalance Research System User Manual

Page 85

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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.