Comtrol DeviceMaster EtherNet/IP-Modbus EIP-MOD User Manual page 80

Shared Memory Configuration Page
The following table provides details about the configuration options. Click the Display button to view detailed
information about a specific block or coil.
Enable Shared Memory (Default
= Off)
Shared Memory Device ID
(Default = 252)
Holding Register Start Address
(Base 1) 
(Default = 400001)
Coil Block Start Address (Base
1) (Default = 1)
Shared Holding Registers
Block
Address Range
Accept Broadcast Messages
(Default = Disabled)
Class1 Read Enable
Default = Block 1 enabled and
Blocks 2 to 8 are disabled
Disable Data Mapping Writes
On Lost Class1 Read Connection
(Default = Disabled)
Clear Data On Lost Class1
Connection
(Default = Disabled)
80 - Chapter 7. Data Mapping Menus
Shared Memory Configuration Page
If selected, enables the Shared Memory functionality.
The Device ID (also often called the unit ID) of the Shared Memory
must be unique within the public Modbus network. The Device ID
range is 1 to 255.
Specifies the starting address of the Shared Memory Holding Register
blocks. The range is 400001 to 463935.
Specifies the starting address of the Shared Memory Coil blocks. The
range is 1 to 64255.
Specifies the block number.
Specifies the block address range.
If selected, the Shared Memory block(s) will accept broadcast messages
addressed to their memory block(s).
If selected, the Shared Memory block is added to the Class1 to the
Active Rx Class 1 Configuration.
If selected, the Data Mapping process performs writes to this Shared
Memory block only when there is an active Class1 read connection to
this block.
If selected, the Shared Memory block's data are cleared when all
Class1 connections to this block are lost.
DeviceMaster EIP-MOD User Guide: 2000664 Rev. A