Control Of The Digital Inputs And Outputs - Siemens SIMATIC FM 450-1 Manual

Counter function module installation and parameter assignment
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Programming in M7 with the Counter Function Library
7.5

Control of the Digital Inputs and Outputs

Digital Inputs
M7CntEnableSet
M7CntDisableSet
7
Digital Outputs
M7CntEnableOut
M7CntDisableOut
7-8
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The counter module has the digital inputs START, STOP, RESET (IF
961-CT1 only) and SET.
If an operating mode with hardware gate control has been set, you can con-
trol the counter module via hardware signals.
Using the SET digital input, the counter channel can be set to the load value
via an external signal (see Chapter 9).
The SET input is enabled with the M7CntEnableSet function. The SET input
(or the associated loading of the counter channel) can be enabled for the up
count direction, the down count direction or both count directions with only
one function call.
Analogously, the SET input can be disabled via the M7CntDisableSet func-
tion. The SET input can be disabled for the up count direction, the down
count direction or both count directions with only one function call in the
same way as it could be enabled.
The counter module has two digital outputs (per counter channel) that you
can use to trigger responses in the process independently of the CPU.
With the M7CntEnableOut function, one output or two of two possible out-
puts can be enabled with a single function call. The function enables the
physical output.
With the M7CntDisableOut function, each output can be disabled individu-
ally or both outputs can be disabled simultaneously with a single function
call.
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FM 450-1 Counter Function Module
C79000-G7076-C450-01

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