Rockwell Automation 1769-HSC Compact High Speed Counter Module - Manual (Page 44)

44 Rockwell Automation Publication 1769-UM006E-EN-P - July 2013
Chapter 2 Module Operation
Table 11 illustrates the step-by-step logical operations that are performed to
determine the final output state. For example, Range 1 values do not affect the
output because Range 1 is disabled, and the Output Off Mask causes some of the
outputs to change to zero because it takes priority over the range masks.
The output parameters shown have been discussed in the previous sections.
Readback/Loopback
The Readback/Loopback function is the feedback of the module’s outputs via its
input array. This 16-bit image includes both real (4) and virtual (12) outputs.
If the module’s output is OFF due to overcurrent, both the Overcurrent status
flag and the Readback bit will indicate the condition being 1 and 0, respectively.
Conversely, should the output be ON due to any module control, such as UDSS,
this will be indicated by Readback.
Table 11 - Output Control Example
Output Parameter Mask Information Logical Operation Result (1)
Range 0 0 0 0 1 0 1 1 0 1 1 0 1 0 0 0 1 OR 0 0 0 1 0 1 1 0 1 1 0 1 0 0 0 1
Range 1 0 0 1 0 1 1 1 1 1 1 1 1 0 0 1 0 OR 0 0 0 1 0 1 1 0 1 1 0 1 0 0 0 1
Range 2 0 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 OR 0 0 0 1 0 1 1 0 1 1 0 1 0 0 0 1
Output On Mask 0 1 0 0 1 0 1 0 1 0 1 0 1 0 0 0 OR 0 1 0 1 1 1 1 0 1 1 1 1 1 0 0 1
Output Overcurrent - - - - - - - - - - - - 1 0 0 0 AND 0 1 0 1 1 1 1 0 1 1 1 1 0 0 0 1
Output Off Mask 1 1 1 1 0 0 0 0 1 1 1 1 1 1 0 0 AND 0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0
Program State
Values - - - - - - - - - - - - 1 1 1 1 Override 0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0
Fault State Values - - - - - - - - - - - - 1 1 1 1 Override 0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0
Final Output State 0 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0
(1) Bolded text indicates that these values have changed.