Siemens SIMATIC Manual page 50

Step Action
6 You can make the following tests.
S
S
Diagnostics/Fault elimination
Errors can occur as a result of operator faults, incorrect wiring or configuration con-
flicts.
How to diagnose such errors and messages is described in the manual, Chapter
Error handling and interrupts".
"
Samples
The
for orientation. You can customize all samples according to your personal applica-
tions.
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Bereich Automatisierungs und Antriebstechnik
Geschaeftsgebiet Industrie Automatisierungssysteme
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8
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Starting/Stopping the counter:
– Start the counter by setting the variables
SW_GATE (SFB parameter SW gate)
and S_HWT (Simulation HW gate) in the
VAT to 1 (logical AND).
– Stop the counter by resetting S_HWT or
SW_GATE to zero.
Loading a count value to the counter:
– JOB_ID = 01 hex ("Write counter di-
rectly")
– JOB_VAL = Count value (-2
– JOB_REQ = 1,
job initiates at the positive edge
ZEn26_02_TF_____31xC_Cnt" project contains more samples you can use
"
Result
S
You can monitor the actual counter
value at the SFB output parameter
COUNTVAL. You can view the status
of the SW or HW gate in the varia-
bles STS_GATE or STS_STRT.
S
You can view the count value loaded
at the SFB output parameter
COUNTVAL. If no load error has oc-
curred, the status at the output para-
31 31
to +2 -1)
meters JOB_DONE = 1 and
JOB_ERROR = 0.
E Siemens AG 2001
Automation System S7-300, Getting Started – Counting
We reserve the right of modifications
A5E00105536 01
Printed in the Fed. Rep. of Germany
A5E00105536-01