Control Information for the 1260-30D
The following information describes the control-register-to-relay-channel mapping for a 1260-30D Relay
Module. This information may be used to control a 1260-30D when using a 1260-01T in the register-based
mode of operation.
Each relay on this module is controlled by setting or clearing a single bit within a Control Register. Control
Registers on the module operate 8 channels simultaneously. There are eight control bits per Control Register.
Setting the bit to a 1 closes the relay; setting the bit to a 0 opens the relay.
The table below shows the mapping from logical channels to control bits. The logical channels are used when
operating the relay module in message-based mode. The control bits within the Control Registers are used to
operate the module in register-based mode.
Each Control Register is located 2 addresses from the previous Control Register. That is, each Control
Register is located at an odd address. This is shown in Table 2-2 of the 1260-01T manual. Control Register 0
is located at the “Base A24 Address” for the module. Consult the “Register-Based Operation” Section of
Chapter 2 of the 1260-01T manual for a description of calculating control register addresses
Channel
Control Register
Control Bit
0
0
0
1
0
1
2
0
2
3
0
3
4
0
4
100
0
5
101
0
6
102
0
7
103
1
0
104
1
1
200
1
2
201
1
3
202
1
4
203
1
5
204
1
6
300
1
7
301
2
0
302
2
1
303
2
2
304
2
3
400
2
4
401
2
5
402
2
6
403
2
7
404
3
0
500
3
1
501
3
2
502
3
3
503
3
4
504
3
5
600
3
6
601
3
7
602
4
0
603
4
1
604
4
2
700
4
3
701
4
4
702
4
5
703
4
6
704
4
7
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