Delta RMC151 - Manual (Page 567)

6 Communication
The MSG block parameters differ slightly depending on the controller and programming
software. The parameters used by RSLogix 5 version 3.2.0.0, RSLogix 500 version
6.30.00, and RSLogix 5000 version 17.00.00 for the PLC-5, SLC 5/05, ControlLogix and
CompactLogix controllers respectively are described below. The SoftLogix 5 parameters
are similar.
ControlLogix and CompactLogix MSG Block Parameters
The ControlLogix or CompactLogix MSG block is displayed as follows. More detailed
information on the MSG block is available in Allen Bradley publication 1756-RM003L-EN-P,
Logix5000 Controllers General Instructions.
The Message Control portion of the MSG requires a tag.
To create a tag:
• Right-click the "?" and choose NewTag.
• Type a name in the Name field.
• Make sure the Data Type is MESSAGE.
• Click Configure. The Message Configuration dialog will open.
• Enter the following on the Configuration tab:
o Message Type: From this drop-down list, select SLC Typed Read to read
values from the RMC, or SLC Typed Write to write values to the RMC. The PLC-
5 Typed Read or Write will also work, and is required for transfers of more
than 58 registers.
o Source Element (reads only): Enter the address of the first RMC register
you want to read. See the Registers Maps for help on addresses.
o Source Element (writes only): Enter the tag in the ControlLogix or
CompactLogix that you want to send to the RMC. In most cases, the element
should be an array or structure composed entirely of REAL data types, since
this is the type of the RMC data.
o Number of Elements: Enter the number of RMC registers to read or write in
this field. The ControlLogix and CompactLogix limit this to approximately 58.
For larger transfers, use the PLC-5 Typed read or write.
o Destination Element (reads only): Enter the tag in the ControlLogix or
CompactLogix into which you want to read the RMC data. See the Source
Element bullet above for suggestions on the data type of the tag.
o Destination Element (writes only): Enter the address of the first RMC
register you want to write. See the Registers Maps for help on addresses.
• Enter the following on the Communication tab:
o For Ethernet:
Path: Enter the path from the ControlLogix or CompactLogix CPU to the RMC.
The format of the path usually is as follows:
[Ethernet module name], 2, [RMC IP Address]
To get the Ethernet module name, click the Browse button and select the
Ethernet module. The "2" specifies the Ethernet port on the module.
Therefore, if a ControlLogix 1756-ENBT is in named LocalEnb, and the RMC
is at address 192.168.0.5, then the following path would be used:
LocalENB, 2, 192.168.0.5
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