Subdivision Of The Data Areas - Siemens Metro 21 M216KA Operator's Manual

13.6 Subdivision of the Data Areas

Control Data
Output Range
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
Control data is transferred from the CPU to the counter module cyclically.
Control data amounting to more than 1 byte is stored as follows:
n
high byte
n + 1
low byte
You can use the control data to change the functioning of the counter module.
The following table indicates which function can be affected by which ad-
dress/addresses.
Module out-
put address +
0
Module out-
put address +
2
Module out-
put address +
0
4
Module out-
put address +
5
Note
You generally have to set bit 7 (valid control commands) to 1 in the user
program. As a result, when there are changes to the operating status of the
CPU or in the event of the DP strang failing or being switched off, you can
recognize this and continue to count, provided the gate was open.
The 1COUNT40kHz Counter Module
0 0
00
H
Loaded value
Comparison value
Gate
0: Stop
1: Start
Output
0: Disable
1: Enable
Loaded value job
0: Do not accept
1: Accept
Comparison value
0: Do not accept
1: Accept
Valid control commands
0: Not valid
1: Valid
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