A
A-4 CP1L Programming Examples
SYSMAC CP1L Getting Started Guide
149
Ap
pend
ix
z
DM Area Setup
• DM Fixed Allocation Words for Modbus-RTU Easy Master
DM settings from D32300 to D32305 are set before the execution of the ladder
program.
D32306 and D32307 do not need to be set explicitly. They are modified by MOV
instructions, and are used to change, start, and stop frequency commands.
• Operation Command (Register No.0001 Hex) allocation and details for Inverter
CIMR-V7
For this example, only operation command (No.0 bit) will be used.
• With Modbus-RTU easy master function, CRC-16 checksums do not need to be
set in the DM area, since they are calculated automatically.
00
D32304
01
00
D32303
09
00
D32302
10
00
D32301
01
00
D32300
02
01
D32306
00
04
D32305
02
58
D32307
02
58
Communication data: D32303 to Max. D32349
FUNCTION
code
Address
00
00
Number of registers data is written to: 2
(2 data: No.0001 and No.0002 on register 2)
Communication
data bytes
Slave
address
Setting
Value
Inverter slave address: 1 (Hex)
Inverter data write: 10 (Hex)
For number of bytes, use 9 bytes from
upper D32303 to upper D32307
Serial Port 1: Command
Register No. for starting data write:0001
(start writing to inverter at register No.0001)
Attached data size in bytes: 4
(4 bytes from lower D32305 to upper D32307)
Data for starting register
(e.g. set 0001 Hex for No.0001
[operation command (see below)])
Data for next register
(e.g. set 60.0Hz (0258 Hex) for No.0002
[frequency command])
Bit No.
Setting
0
Operation command (1: Start)
1
Normal/reversed rotation (1: Reversed)
2
External error (1: EF0)
3
Error reset (1: Error reset)
4
Multifunction input 1 (1: ON)
5
Multifunction input 2 (1: ON)
6
Multifunction input 3 (1: ON)
7
Multifunction input 4 (1: ON)
8
Multifunction input 5 (1: ON)
9
Multifunction input 6 (1: ON)
10
Multifunction input 7 (1: ON)
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