13-19
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
13.6 Subdivision of the Data Areas
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
n + 1
high byte
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 a
0
Loaded value
Module out-
put a
2
Comparison value
Module out-
put a
4
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
0
0
0
Module out-
put a
5
00
H
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.
Control Data
Output Range
The 1COUNT40kHz Counter Module