Unit Settings
Section 5-1
54
Setting values in BCD
The table below lists the DM words for configuring the I/O data mapping, with
the possible values and their meaning.
Except for the definition of the start address in the PLC CPU, all values are in
BCD. To be able to distinguish between start addresses in different PLC
memory areas, the first digit of the ‘start address’ indicates the PLC memory
area, the following three digits indicate the address in the PLC memory area
in BCD format.
Words vs. Bytes
Note that data allocation in the PLC memory is in WORD units, whereas the
allocation in the Unit’s buffers is in BYTE units (1 word = 2 bytes). The start
address in an I/O data buffer area must always be even. Odd-valued entries
will generate a setting error.
CS1-series
For details on I/O data mapping on CS1-series PLC’s, see Appendix C.
DM word
Value
Meaning
m
Number of output data areas
0000
Default mapping
C200HS:
PLC addresses IR050 ~ IR081 are mapped to
Unit output buffer bytes 000 ~ 063
C200HE,C200HG,C200HX:
PLC addresses IR050 ~ IR099 are mapped to
Unit output buffer bytes 000 ~ 099
0001
One user-defined data output area
0002
Two user-defined data output areas
other
Default mapping (see value 0000)
m+1
Output area 1 : start address in the output buffer
0000 ~ 0510
Byte 000 ~ 510 (even) in output buffer of the Unit
other
Setting error *
1
, output area is ignored
m+2
Output area 1 : start address in the CPU
0000 ~ 4095
DM0000 ~ DM4095 (C200HE-CPU11)
0000 ~ 5999
DM0000 ~ DM5999 (all other CPUs)
A000 ~ A235
IR000 ~ IR235
A300 ~ A511
IR300 ~ IR511
B000 ~ B099
HR00 ~ HR99
C000 ~ C063
LR00 ~ LR63
other
Setting error *
1
, output area is ignored
m+3
Output area 1 : size
0000 ~ 0100
0000 ~ 0100 words to be transferred from PLC to
Unit output buffer *
2
other
Setting error *
1
, output area is ignored
m+4
see m+1
Output area 2 : start address in the output buffer
m+5
see m+2
Output area 2 : start address in the CPU
m+6
see m+3
Output area 2 : size
continued
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