Rockwell-automation 193-EC4 EC4 Current Monitoring Relay User Manual User Manual download pdf (Page 105)

106 Rockwell Automation Publication 193-UM011A-EN-P - September 2010

Chapter 10 Using DeviceLogix™

DeviceLogix Programming

DeviceLogix has many applications and the implementation is typically only

limited to the imagination of the programmer. Keep in mind that the application

of DeviceLogix is only designed to handle simple logic routines.

DeviceLogix is programmed using simple Boolean math operators, such as AND,

OR, NOT, timers, counters, and latches. Decision making is made by combining

these Boolean operations with any of the available I/O. The inputs and outputs

used to interface with the logic can come from the network or from the device

hardware. Hardware I/O is the physical Inputs and Outputs located on the device

such as push buttons and pilot lights that are connected to the EC4 Current

Monitoring Relay. There are many reasons to use the DeviceLogix functionality,

but some of the most common are listed below:

• Increased system reliability

• Improved diagnostics and reduced troubleshooting

• Operation independent of PLC or Network status

• Continue to run process in the event of network interruptions

• Critical operations can be safely shutdown through local logic

DeviceLogix can be programmed using function blocks or ladder logic through

RS Networx for DeviceNet. After a successful download to the EC4 Current

Monitoring Relay, DeviceLogix can be enabled using RS Networx for DeviceNet

or the DeviceNet configuration terminal (Cat. No. 193-DNCT).

DeviceLogix Programming Example

The following example shows how to program a simple logic routine to control

the EC4 Current Monitoring Relay’s outputs based on the condition of input

signals. OUT A control is defined by the states of IN1 and IN2 processed

through a Boolean OR gate. OUT B control is defined by the states of IN3 and

IN4 processed through a separate Boolean OR gate. This example is using

RSNetworx for DeviceNet version 8.00.01 and an EC4 current monitoring relay.

1. While in RSNetWorks for DeviceNet, double-click on the EC4 and select

the DeviceLogix Tab. If you are prompted with a dialog box while online

with the EC4, then select Upload. Next, select Start Logic Editor, select

the Function Block Editor, and press OK.

IMPORTANT

Before programming logic it is important to decide on the conditions

under which the logic run. As defined earlier, the conditions can be

defined by setting parameter 79 (Comm Override) and parameter 80

(Network Override) to the value that you want.

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 156 157

No comments

Rockwell-automation 193-EC4 EC4 Current Monitoring Relay User Manual User Manual Page 105