A
GFK-2731
Chapter A
A-11
A 4.2
VersaSafe multiplexer mode
In this operating mode, the input data of a IC220SDL543 safe input module is output one-
to-one to the output terminals of the IC220SDL953. A controller is still required as this
copies the data (see also Figure A-5 "I/O image and data flow in multiplexer mode" on
page A-16).
The IC220SDL953 and IC220SDL543 which are to operate together in multiplexer mode
are configured and assigned to one another via the switch position of the DIP switches (see
"Setting the DIP switches" on page 4-2). The parameterizations of both modules are fixed
and cannot be modified. A parameterization tool is not required for this operating mode.
The IC220SDL953 parameterizes both the local safe I/O devices and the input module as
follows:
The watchdog time (t
FWD
) is set to a fixed value of 200 ms.
Multiplexer mode is intended as a replacement for cabling. A stand-alone solution (one
using MUX modules, for example) cannot be implemented with multiplexer mode.
NOTE: Not a safe application
In order to ensure correct use, subsequent safety logic (an evaluation unit) is required.
Table A-9
Parameterization of
all
safe outputs of the IC220SDL953
Parameterization
Parameterized as
Remark
Assignment
Assigned
The parameterization is set automatically
and cannot be changed.
Output
Single-channel
Switch-off delay for stop
category 1
Disabled
Value of switch-off delay for
stop category 1
–
Value range of switch-off
delay for stop category 1
–
Test pulses (output disabled)
(in software: test impulses
(output switched off))
Enabled
Enable
Disabled
