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(2) Using memory
To allow the memory to be used by the IV-S20, enter a result write start address within the
following setting range.
(3) Connections
1 Example of RS-232C communication
Communication connector on
the IV-S20 (RS232C/RS422)
Signal
Pin No.
name
Connector
FG
shield
2
RD
3
SD
5
SG
2 Example of RS-422 communication
IV-S20 communication
connector
(RS232C/RS422)
Pin No.
Signal name
Case
4
7
8
9
Memory
D (data register)
C500-LK203
C200-LK201
CV500-LK201
(Communication port 1)
Shielded cable
15m or less
RS-232C
Shielded, twisted-pair cable
FG
TA
TB
RA
SG
1 km max.
RS-422 (4-line system)
14-27
Range (address)
0 to 9999
CV500-LK201
(Communication port 2)
CV CPU module
Signal
Pin No.
Pin No.
Connector
1
hood
2
2
3
3
4
4
5
5
7
9
Calculator link
module
Signal name
FG
RDB(RD+)
RDB(RD—)
SDB(SD+)
SDA(SD—)
RS
CS
Pin numbers vary with
the module to be used
Computer Link
name
FG
SD
RD
RS
CS
SG
14
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