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3-2
Section
Functions
33
Example: C200HW Series with PRM21 default I/O mapping
#1
4-point
Analog
Output Unit
PRT1-COM with
station address 05
I/O Unit
addresses
PROFIBUS-DP Network
#0
32 outputs
#3
16 inputs
#2
16 inputs
PRT1-COM with
station address 12
#0
16 inputs
#1
4-point
Analog
Output Unit
#2
32 outputs
Output area
Input area
Area allocated
i
IR50
32 output bits for
U i #0
Area allocated
i
IR350
I/O Unit interface
f
i
0
to station
address 05
IR51
p
Unit #0
to station
address 05
IR351
/
status for station 05
address 05
IR52
4 analog outputs for
U i #1
address 05
IR352
16 input bits for Unit #2
IR53
g
p
Unit #1
IR353
16 input bits for Unit #3
IR54
Area allocated
i
IR354
I/O Unit interface
f
i
12
IR55
to station
address 12
IR355
/
status for station 12
Area allocated
i
IR56
4 analog outputs for
U i #1
address 12
IR356
16 input bits for Unit #0
to station
address 12
IR57
g
p
Unit #1
address 12
IR58
IR59
IR60
32 output bits for
U i #2
IR61
p
Unit #2
3-2-4 I/O Unit Interface Status
The following I/O Unit interface status is maintained in the CPU Unit.
•
I/O Unit connection information (I/O Unit interface status)
•
Registered I/O Unit addresses
•
Error I/O Unit addresses
As shown in the following diagram, the status consists of two words. The first two
words of the Communication Unit allocation input area in the CPU Unit are
allocated for this status. Include a program section in the CPU Unit to check this
status and perform error processing.
I/O Unit connection information
Error I/O Unit addresses
Registered I/O Unit addresses
0 wd
+1 wd