Chapter 4
Register Descriptions
© National Instruments Corporation
4-5
SCXI-1160 User Manual
Status Register
The Status Register is a 1-bit read-only register that is located at address 0002 (hexadecimal).
When this bit is high, it indicates that the relays are finished switching and you can perform
further operations. If this bit is low, the relays are still switching; wait until the status bit goes
high again before you perform any further task with these relays.
After each write operation to the Data Register, it is recommended that you poll and check the
Status Register. Select the Status Register in the same manner as the other two registers by
writing its address to the Address Handler. If you do not want to poll the Status Register, you
must make sure that at least 20 msec have elapsed since the last write to the Data Register before
you perform any new operations on the relays.
At reset or power up, the Status Register bit is set high (relays are not switching).