Siemens SIMATIC S5 Manual page 160

Testing and Simulation with COM 265
The simulator's dynamic response
The COM 265 simulator simulates the actual real-time conditions of the IP 265 in the programmer,
i.e. the interconnections in the IP 265 user program are clocked at 128 kHz (IP 265 clock pulse:
1/128 kHz=7.8 fs). In order to be able to visually monitor signal state changes, there are two ways
of defining the interval between two clock pulses on the programmer monitor itself:
• You can specify how great the time difference between two clock pulses should be
(configurable), and the simulator then automatically clocks the connection.
• You can clock the connection manually in single-step mode (default setting).
Note
When you change the signal state of a binary variable, the change does not affect the
control system flowchart until the next IP 265 clock pulse.
The COM 265 simulator simulates the IP 265's "internal" program scan. Delays such as input and
output delays ( Section 4.2) and configured debouncing times are not taken into account.
Additional performance characteristics of the simulator
• Switching from "Simulator" to "Editor"
The simulator level has no provisions for editing functions such as changing an operand
identifier or deleting a language element, etc. However, minor modifications, such as those
required while testing, are nonetheless possible, and can be carried out quickly and easily:
You can go from the simulator directly to the COM 265 editor.
Simulator
&
I 0.0
Q 0.5
I 0.1
F1 F2 F3 F4 F5 F6 F7 F8
During such a change, changes in the "old" COM 265 screen form can be confirmed with <1>
(see above) or revoked with <ESC>.
Switching from the COM 265 "Simulator" to the COM 265 "Editor" is context-dependent, i.e. the
current section of the control system flowchart remains on screen; only the header and the function
key menu change (also, you can always go directly to the editor while in the simulator's Text
format).
10-2
1
CORR
1
END
Editor
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I 0.0
I 0.1 Q 0.5
F1 F2 F3 F4 F5 F6 F7 F8
EWA 4NEB 812 6130-02a
IP 265