PLX51-DL-232
Setup
Data Logger
User Manual
ProSoft Technology, Inc.
Page 22 of 59
Parameter
Description
This function is only available in Full Duplex mode.
Node Address
The node address is the local node address of the PLX51-DL-232.
Retry Limit
This determines how many times the PLX51-DL-232 must retry and message
exchange before failing it.
Timeout
This determines the interval between retries for a failed message exchange.
Reply Msg Wait
This is the minimum delay before the DF1 reply is transmitted to the DF1
device.
Duplicate Detection
This configures the PLX51-DL-232 to check for duplicate packets and flagging
them.
3.5 Data Source Configuration
The Data Source tabs determine the PLX51-DL-232 communication mode used to
acquire data. The Data Source options include:
•
Logix Source
– ControlLogix and Compact Logix controllers
•
DF1 Source
– For collecting data over DF1 Serial communications
•
Modbus Source
– for ModbusRTU (Serial) and ModbusTCP (Ethernet)
communications
Once the data source is selected, each tab allows the configuration of up to three source
devices and a total of 200 tags.
Tags can be logged as a result of their individual log criteria
or
via a group trigger. There
are eight trigger groups (A thru H), and a tag can be a member of any trigger group.
Groups are in turn triggered by one or more tags. The triggering of a group ensures all
its member’s values are logged at the same instance.
3.5.1 Group and Tag Triggers
Three parameters determine when a tag is triggered:
•
Delta Y (Δy) – A change in the value of the tag by this amount or more, AND
•
Min ΔT – The minimum time in seconds between each consecutive trigger, OR
•
Max ΔT – The maximum time between each consecutive trigger. Setting the Max
ΔT to ‘
0
’ disables the “heartbeat” and allows you to log on trigger.
