Omron CP1E CPU UNIT SOFTWARE - Setting and Word Allocation; DM Fixed Allocation Words

14 Serial Communications
14-12
CP1E CPU Unit Software User’s Manual(W480)
DM fixed allocation words and Auxiliary Area words are allocated for the Modbus-RTU Easy Master
according to the CPU Unit type and connected port as shown below.
 DM Fixed Allocation Words
14-4-3 Setting and Word Allocation
CP1E CPU Unit serial port DM fixed allocation words Auxiliary Area bits
CP1E N14/20 CPU
Unit
Built-in RS-232C port D1200 to D1299 A640.00 to A640.02
CP1E N30/40/60 or
NA20 CPU Unit
Built-in RS-232C port D1200 to D1299 A640.00 to A640.02
Serial option port D1300 to D1399 A641.00 to A641.02
Word
Bits Contents
Built-in RS-232C
port of CP1E
N14/20/30/40/60
or NA20 CPU
Unit
Serial option port
of CP1E
N30/40/60 or
NA20 CPU Unit
D1200 D1300 00 to 07 Command Slave address (00 to F7 hex)
08 to 15 Reserved (Always 00 hex.)
D1201 D1301 00 to 07 Function code
08 to 15 Reserved (Always 00 hex.)
D1202 D1302 00 to 15 Number of communications data bytes (0000 to
005E hex)
D1203 to D1249 D1303 to D1349 00 to 15 Communications data (94 bytes maximum)
D1250 D1350 00 to 07 Response Slave address (01 to F7 hex)
08 to 15 Reserved (Always 00 hex.)
D1251 D1351 00 to 07 Function code
08 to 15 Reserved
D1252 D1352 00 to 07 Error code
(See error codes in the following table. )
08 to 15 Reserved (Always 00 hex.)
D1253 D1353 00 to 15 Number of response bytes (0000 to 03EA hex)
D1254 to D1299 D1354 to D1399 00 to 15 Response data (92 bytes maximum)