Specifications

CPU and Input/Output Configuration
6-8
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
6.4 Using the Output Table to Configure the States of the Outputs
The S7-200 CPU provides the capability either to set the state of the digital output
points to known values upon a transition to the STOP mode, or to leave the
outputs in the state they were in before the transition to the STOP mode.
The output table is part of the CPU configuration data that is downloaded and
stored in the CPU memory.
The configuration of output values applies only to the digital outputs. Analog output
values are effectively frozen upon a transition to the STOP mode. The CPU does
not update the analog inputs or outputs as a system function. No internal memory
image is maintained for these points by the CPU.
To access the output table configuration dialog box, select the menu command
View > System Block and click on the Output Table tab. See Figure 6-8. You have
two options for configuring the outputs:
S If you want to freeze the outputs in their last state, choose the Freeze Outputs
box and click on “OK.”
S If you want to copy the table values to the outputs, then enter the output table
values. Click the checkbox for each output bit you want to set to On (1) after a
run-to-stop transition, and click on “OK” to save your selections.
The default values of the table are all zeroes.The default STEP 7-Micro/WIN 32
configuration and the default CPU configuration are disabled for all outputs.
System Block
Configuration parameters must be downloaded before they take effect.
Q1.x
Q2.x
Q3.x
Q4.x
Q5.x
Q6.x
Q0.x
Q7.x
7 6543 2 10
Freeze Outputs
Password
Port(s)
Retentive Ranges
Analog Input Filters
Output Table Input Filters
Pulse Catch Bits
Background Time
OK Cancel
Apply
76543210
Q9. x
Q10.x
Q11.x
Q12.x
Q13.x
Q14.x
Q8.x
Q15.x
Not all PLC types support every System Block option. Press F1 to
see which options are supported by each PLC.
Defaults
These outputs
will be on after
a run-to-stop
transition.
Figure 6-8 Configuring the State of the Outputs