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The following information describes the control-register-to-relay-channel mapping for a 1260-12
Relay Module. This information may be used to control a 1260-12 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.
2 Addendum Page 6/98
Control Information for the 1260-12
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
1260-12 User Manual
Control Bit
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
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