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Configuring the ControlLogix High Speed Analog I/O Module
5-5
Communication format
Communication format determines:
• what type of configuration options are made available.
• what type of data is transferred between the module and its
owner controller.
• what tags are generated when configuration is complete.
• the connection between the controller writing configuration and
the module itself.
Table 5.1 lists the possible Communication format choices. In addition
to the description below, each format returns status data and rolling
timestamp data.
Table 5.1
Communication format Choices on the High Speed Analog I/O Module
Format:
Definition:
Float Data
Module returns floating point data.
CST Timestamped
Float Data
Module returns floating point data with the value of the system
clock (from its local chassis) when the data is sampled.
Listen-only CST
Timestamped
Float Data
Module returns floating point data with the value of the system
clock (from its local chassis) when the data is sampled to a
controller that does not own the module.
Listen-only Float Data
Module returns floating point data to a controller that does not
own the module.
IMPORTANT
Once the module is created, the communication
format cannot be changed. The module must be
deleted and recreated.
Electronic Keying
When you write configuration for a module you can choose how
specific the keying must be when a module is inserted into a slot in
the chassis. The following electronic keying options are available:
• Compatible Module
• Disable Keying
• Exact Match
For more information on electronic keying, see page 3-3.
Publication 1756-UM005A-EN-P - April 2002