Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 120)

Publication AG-UM008C-EN-P - February 2005
3-52 Configuring MicroLogix 1100/1200/1500 Controllers
Modbus
Addressing Description Valid MicroLogix Addressing
File Type Data File Number Address
0001 to 4096 Read/Write Modbus Coil Data space Bit (B) or Integer (N) 3 to 255 bits 0 to 4095
10001 to 14096 Read-Only Modbus Contact Data space Bit (B) or Integer (N) 3 to 255 bits 0 to 4095
30001 to 30256 Read-Only Modbus Input Register space Bit (B) or Integer (N) 3 to 255 words 0 to 255
30501 to 30532 Modbus Communication Parameters Communication Status File - -
31501 to 31566 Read-Only System Status File space Status (S) 2 words 0 to 65
40001 to 40256 Read/Write Modbus Holding Register space Bit (B) or Integer (N) 3 to 255 words 0 to 255
40257 to 41280
(1) Read/Write Modbus Holding Register space Bit (B) or Integer (N) 3 to 255 words 0 to 255
of four Holding
Register files
41501 to 41566 Read/Write System Status File space Status (S) 2 words 0 to 65
41793 to 42048
(1) Read/Write Modbus Holding Register space Bit (B) or Integer (N) 3 to 255 words 0 to 255
of the last
Holding
Register file
(1) These addresses only become active when specially configured for expanded holding registers.
Modbus
Addressing Modbus Address Reference Modbus Function Code
(decimal)
0001 to 4096 Read/Write Modbus Coil Data space 1, 5, 15
10001 to 14096 Read Only Modbus Contact Data space 2
30001 to 30256 Read Modbus Input Register space 4
30501 Modbus Data Table Coil File Number 4
30502 Modbus Data Table Contact File Number 4
30503 Modbus Data Table Input Register File Number 4
30504 Modbus Data Table Holding Register File Number 4
30506 Pre-Send Delay 4
30507 Modbus Slave Address 4
30508 Inter-character Timeout 4
30509 RTS Send Delay 4
30510 RTS Off Delay 4
30511 Parity 4
30512 Presentation Layer Error Code 4
30512 Presentation Layer Error Code 4
30513 Presentation Layer Error Count 4
30514 Executed Function Code Error 4
30515 Last Transmitted Exception Code 4
30516 File Number of Error Request 4