Turn-On, Start-Upbehavior; Reading The Binarylnputs - Siemens SIMATIC S5 1P 243 Equipment Manual

R 02/92
7.4.4 Turn-On, Start-Up Behavior
The program is loaded entirely from the floppy disk to the user memory of the programmable con-
troller.
During start-up there is no need to supply any data to the analog module. Its ready state is indi-
cated by the green LED on the front panel. The LED lights up when an external 24 V voltage is
applied.
If at the time the programmable controller is turned on, all simulator inputs are in switch position
"O", no outputs maybe set after the start-up of the programmable controller.
If one of the outputs Q 6. O/Q 10.0 (flag F 14.0) or Q 6.1/Q 10.1 (flag F 14.1) is set, a para-meteriza-
tion error was made. The exact error cause can be identified at flag byte FY 16 (for the
parameterization error shown for output Q 6. O/Q 10.0) or at flag byte FY 17 (for the parametrizat-
ion error shown for output Q 6.1/Q 10.1). Both flag bytes are set in accordance with the error bytes
FY 255 of the standard function blocks FB 160 and FB 161.
7.4.5 Reading the Binary Inputs
If input 14.1 is brought to switch position"1", the binary inputs connected to the analog module
are displayed at output byte QB4/QB8. If the signal status of these inputs is modified, the display
on the simulator is modified accordingly.
Programming Instructions
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