Siemens simatic s7-400 FM 450-1 - Page 67

Modes, settings, parameters and commands
8.12 Initiating a process interrupt
Counter module FM 450-1
Manual, 02/2014, A5E03648739-02
67
Which commands are available?
You can influence the counting process of the FM 450-1 by means of the following
commands:
Table 8- 3 The FM 450-1 commands
Name
Description
Open and close gate The counting process starts when a gate opens and ends when it
closes.
Set counter
The counter can be set to the load value using various signals.
Basic parameter assignment
When configuring the hardware you define the basic parameter assignment of each FM 450-
1. The following table shows the significance of the relevant parameters.
Table 8- 4 Parameters for the basic parameter assignments
Name
Option
Description
Interrupt selection
None
You enable the corresponding interrupts via this
selection.
Diagnostics
Process
Process and diagnostics
Reaction to a CPU
STOP
STOP Outputs immediately disabled
counting process aborted
Continue operating
The module continues operating.
Terminate active job The single count process continues until it
terminates itself or, in modes with a HW gate,
until it is terminated by closing the HW gate.
The periodic counting process is reparameterized
into a single counting process and is terminated
as such.