Switch Data Write Register - Racal Instruments 1260-82 User Manual

1260-82 User Manual
Switch Data Write
Register
Control Register is located at (Module Base Address) + 5
Relay
Control
Register Bit
0 (LSB)
1
2
3
4
5
6
7 (MSB)
205C0F
When a channel is closed, the COM n input for the relay is
connected to the CH n1 (Normally Open) output (n=channel).
When a channel is opened, the COM n input is connected to the
CH n0 (Normally Closed) output (n=channel).
Each channel of the 1260-82 is controlled by a single bit within
the Relay Control Register. When the bit is set to a 1, the
corresponding channel is closed. When the bit is set to a 0, the
corresponding channel is opened.
The Relay Control Register may be read as well. When the
control register is read, the module returns the detected position
rather than the commanded position. If the detected position is
NOT the same as the commanded position, after the 15
millisecond settling time, then an error may have occurred. When
the firmware controls the operation of the relays (message-based
mode), this will result in the illumination of the ERROR LED if
confidence mode is enabled. When register-based control is
used, the programmer is responsible for controlling the ERROR
LED.
The Relay Control Register bit assignments are shown below and
also in Appendix A.
Channel COM Channel
0 COM 0
1 COM 1
2 COM 2
3 COM 3
4 COM 4
5 COM 5
N/A N/A
N/A N/A
ERROR LED Control Register
OPEN
Connects
COM To
CH 00
CH 10
CH 20
CH 30
CH 40
CH 50
N/A
N/A
CLOSE
Connects
COM To
CH 01
CH 11
CH 21
CH 31
CH 41
CH 51
N/A
N/A
Module Operation 3-7