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The following information describes the control-register-to-relay-channel mapping for a 1260-37B
Relay Module. This information may be used to control a 1260-37B 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. 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 between logical channels used to operate the relay module in
message-based mode and the bits within the Control Registers which may be used to operate the
channel in register-based mode.
Each Control Register is located 2 addresses from the previous Control Register. 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.
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Control Information for the 1260-37B
Channel
Control Register
0
0
1
0
2
0
3
0
4
0
5
0
6
0
7
0
8
1
9
1
10
1
11
1
12
1
13
1
14
1
15
1
16
2
17
2
18
2
19
2
20
2
21
2
22
2
23
2
24
3
25
3
26
3
27
3
28
3
29
3
30
3
31
3
32
4
33
4
34
4
35
4
36
4
37
4
1260-37 User Manual
Control Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
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