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3--6
Understanding the Features
PLC Registers
The OP400 panels communicate to the PLC through user defined PLC data
registers. The starting or “Base” register is assigned during panel configuration and
automatically occupies fifteen consecutive 16-bit data registers. In this manual the
registers are identified as M+0, M+1, M+2, thru M+14. Force control register M+14
contains bit-of-word information to force a setpoint to a specified value. The term
PLC register is used for the area of memory within the PLC used for data exchange
with the OP--414. PLC registers (addresses) are sometimes known as data
registers, internal registers or 16-bit (word) addresses.
The OP--414 uses a bank of 15 contiguous PLC registers. The register set is shown
in the table below.
Field point 3 data cell 2 (long BCD)
Field point 1 data cell
Field point 1 data cell 2 (long BCD)
Field point 2 data cell
Field point 2 data cell 2 (long BCD)
Field point 3 data cell
Field point 4 data cell
Function
M+0
M+1
M+2
M+5
M+6
Register
M+3
M+4
PLC
Register
OP--414 Panel PLC Register Map
Field point 6 data cell 2 (long BCD)
Field point 4 data cell 2 (long BCD)
Field point 5 data cell
Field point 5 data cell 2 (long BCD)
Field point 6 data cell
Field point force data cell
M+7
M+8
M+11
M+12
M+9
M+10
Field point force data cell 2 (long BCD)
Force control
M+13
M+14
Force Control Registers
LSB
12
13
14
15
8
9
10
11
4
5
6
7
0
1
2
3
MSB
M+14
FP5
FP6
FSP
FP1
FP2
FP3
FP4
Field point force data cell
Field point force data cell 2 (long BCD)
M+13
M+12
PLC Register
Overview
PLC Register Map
Force Control
Registers
