Rockwell Automation 1756-IF4FXOF2F ControlLogix High-speed Analog I/O Module - Manual (Page 46)

46 Rockwell Automation Publication 1756-UM005B-EN-P - January 2013
Chapter 3 Module Features
The initial sample is delayed to synchronize with other modules, but then each
module samples its input channels at the appropriate RTS interval. For example,
the first sample is delayed to synchronize with the sampling of the other modules.
The delay is 1 to 2 RTS worth of time. If you use an RTS = 10 ms, the first sample
delays an extra 10…20 ms to achieve synchronization.
Features Specific to
Module Outputs The following features are specific to high-speed analog I/O module outputs:
• Multiple Output Ranges
• Ramping/Rate Limiting
• Hold for Initialization
• Open Wire Detection—Current Mode Only
• Clamping/Limiting
• Clamp/Limit Alarms
• Output Data Echo
Multiple Output Ranges
You can select from a series of operational ranges for each output channel on
your module. The range designates the minimum and maximum signals that are
detectable by the module. The following output ranges are available on the
high-speed analog I/O module:
• -10…10V
• 0…20 mA
To see how to choose an output range for your module, see page 77 .
You must wire the module differently, depending on what operating mode
(current or voltage) you plan to use. For an example of how to wire the module,
see
page 63 .
IMPORTANT When Synchronize Module Inputs is enabled, the inputs across multiple
modules will be synchronized within 100 mS of each other, regardless of the
RTS rate.