18-10
OP27, OP37 Equipment Manual
Release 05/99
18.3
Control Panel Interface
A Control Panel Interface (CPI) is available as an option for operator panels
OP27 and OP37 connected to SIMATIC S7 PLCs. The following versions are
possible:
Operating
it
Control Panel Interface with
unit
16 inputs/outputs
16 inputs/outputs
32 inputs/outputs
OP27
–
–
OP37
–
The control panel interface extends the 24 DP direct keys on the OP27 and the
36 DP direct keys on the OP37 by 16 and 32 digital inputs/outputs, respec-
tively.
The Control Panel Interface must be implemented where fast key operation is
required without any communication–related delays (jog operation < 100 ms).
It communicates via the PROFIBUS-DP bus and can only be used in conjunc-
tion with the SIMATIC S7 PLC.
Each module provides 16 digital inputs/outputs. An external keypad with con-
trols and light indicators can be connected for each module board. The assign-
ment of the digital inputs/outputs to the control and light indicators of the
external keypads is configured in the PLC (also refer to User’s Manual
Communication).
The cable between the OP and the external keypad with control and light indi-
cators must not be more than 1 m long.
The Control Panel Interface requires its own power supply. Note, however, that
the digital inputs/outputs are not isolated from the OP.
Function of the
control panel
interface
Cable lengths
External power
supply
Options
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