Overview
:
This MxM allows Manager to interface with a Rockwell Automation Control Logix family PLC using the CIP Ethernet/IP protocol to read and write symbolic references created in the PLC.
This release of the MxM supports the basic PLC integer types with size 8,16 or 32 bits.
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Installation
(MXM) :
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Creation
(Device) :
Device creation window :
The setup window allows the user to enter the IP address for the PLC, and provides a mechanism to enter a list of Variables that the user wishes to read from and write to in the PLC. Each PLC variable entered will be given a Medialon variable that can be used to test the current value. Note that the PLC variables can only be changed using the Write Variable command. Setting the value of the Medialon Manager variables will not cause the variable in the PLC to be changed.
Note: When defining symbolic links on the PLC for use with Medialon Manager, it is important to follow the Manager naming conventions to ensure compatibility.
Alias Variables : Alias variables provide a simple way to handle bit sized flags in integer PLC variables. An alias consists of a name, the name of a PLC variable and the bit position within the PLC variable. Alias variables are mapped to integer variables in Manager, and can take the values 0 or 1. Alias variables can be changed using the Write Variable command. NOTE: The bit value written to the alias will be incorporated into the last value polled from the PLC for the PLC variable. The resulting value will then be sent to the PLC. This can introduce problems if the PLC modifies the variable, between the last poll and the update command.
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Commands
(List Of) :
Write Variable :
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Variables
(List Of) :
Status :
Type
: Enum.
Description : Current status of the device connection.
Available Values :
"Unconnected" | : | Not connected |
"Connecting" | : | Connection in progress |
"Ready" | : | Device is connected
and ready to work |
"Busy" | : |
Device working |
Error :
Type
: Enum.
Description : Current error status of the device.
Available Values :
"No Error" | : | Device is Ok |
"Network Error" | : | A network or transmission error occurred |
Additional variables can be created in the setup screen, which mimic variables in the PLC.
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Support
(Difference with previous versions) :
V 1.0.1:
- Added: PLC ENet Slot number can now be specified in the Setup Dialog.
- Added: Alias variables for bit manipulation.
V 1.0.2:
- Fixed: Alias write commands are sometimes not correctly executed if they are fired quickly.
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