Rockwell Automation 1769-HSC Compact High Speed Counter Module - Manual (Page 107)

Rockwell Automation Publication 1769-UM006E-EN-P - July 2013 107
Module Configuration, Output, and Input Data Chapter 4
IDW - Invalid Direct Write (Ctr[0].InvalidDirectWrite to
Ctr[3].InvalidDirectWrite)
This bit is set when the Range12To15[
n].HiLimOrDirWr is invalid. (For
example, if Ctr
nMaxCount < Range12To15[n].HiLimOrDirWr or
Range12To15[ n].HiLimOrDirWr < CtrnMinCount.)
When this error occurs, the entire output array is rejected until a valid
configuration is detected.
IC - Invalid Counter (Ctr[1].InvalidCounter to Ctr[3].Invalid Counter)
When set (1) this bit indicates that an invalid control bit is set for the counter.
Depending on the value of NumberOfCounters, the following errors will occur:
• If NumberOfCounters < 1, then setting one of the control bits for
Counter 1 will result in input error flag Ctr[1].InvalidCounter.
• If NumberOfCounters <2, then setting one of the control bits for
Counter 2 will result in input error flag Ctr[2].InvalidCounter.
• If NumberOfCounters <3, then setting one of the control bits for
Counter 3 will result in input error flag Ctr[3].InvalidCounter.
When this error occurs, the entire output array is rejected until an output array
that does not have this error is sent.
The control bits are shown on page 92 .
RV - Rate Valid (Ctr[0].RateValid to Ctr[3].RateValid)
This bit is set (1) when the rate value indicated in Ctr[
n].CurrentRate is current.
When this bit is reset (0), Ctr[
n].CurrentRate is frozen at the last known good
value.
This bit is reset when the Ctr[
n].Overflow or Ctr[n].Underflow bits have been
set during the last Ctr
nCyclicRateUpdateTime period.
See page 34 for more Rate Valid reset conditions.
IMPORTANT For the L23E packaged controllers Embedded HSC, the ranges referred to
in this section are numbered 0…3 instead of 12…15. The ranges in this
section apply to only the 1769-HSC module and the CMX 5370 L2
packaged controllers Embedded HSC.
IMPORTANT For the L23E packaged controllers Embedded HSC, the RV value does not
apply; they are not used and are always set to 0. The RV values in this
section apply to the 1769-HSC module and the CMX 5370 L2 packaged
controllers Embedded HSC.