Control Information for the 1260-30C
The following information describes the control-register-to-relay-channel mapping for a 1260-30C Relay
Module. This information may be used to control a 1260-30C 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
5
0
5
6
0
6
7
0
7
8
1
0
9
1
1
100
1
2
101
1
3
102
1
4
103
1
5
104
1
6
105
1
7
106
2
0
107
2
1
108
2
2
109
2
3
200
2
4
201
2
5
202
2
6
203
2
7
204
3
0
205
3
1
206
3
2
207
3
3
208
3
4
209
3
5
300
3
6
301
3
7
302
4
0
303
4
1
304
4
2
305
4
3
306
4
4
307
4
5
308
4
6
309
4
7
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