Channel alarms, Calibration, Channel alarms calibration – Rockwell Automation 1771-IXHR , D17716.5.80 HIGH RESOL.THERMOCOUPLE User Manual
Page 26: Module configuration chapter 5
Module Configuration
Chapter 5
5Ć3
In the RTS mode the module scans and updates its inputs at a user defined time
interval (
∆
T) instead of the default interval. The module ignores block transfer
read (BTR) requests for data until the sample time period elapses. The BTR of a
particular data set occurs only once at the end of the sample period and
subsequent requests for transferred data are ignored by the module until a new
data set is available. If a BTR does not occur before the end of the next RTS
period, a time–out bit is set in the BTR status area. When set, this bit indicates
that at least one data set was not transferred to the processor. (The actual
number of data sets missed is unknown.) The time–out bit is reset at the
completion of the BTR.
Set appropriate bits in the BTW data file to enable the RTS mode. You can
select RTS periods ranging from 25 milliseconds (msec) to 3.1 seconds in
increments of 25msec. Refer to Table 5.B below for a sampling of actual bit
settings. Note that the default mode of operation is implemented by placing all
zeroes in bits 09 through 15.
Table 5.B
Bit Settings for the Real Time Sample Mode
Decimal Bits
15
14
13
12
11
10
09
Sample Time Period
0
0
0
0
0
0
0
Inhibited
0
0
0
0
0
0
1
25 ms
0
0
0
0
0
1
0
50 ms
0
0
0
0
1
0
0
100 ms
0
0
1
0
0
0
0
400 ms
0
0
1
0
1
0
0
500 ms
0
0
1
1
0
0
0
600 ms
0
0
1
1
1
0
0
700 ms
0
1
0
0
0
0
0
800 ms
0
1
0
0
1
0
0
900 ms
0
1
0
1
0
0
0
1.0 sec
0
1
1
1
1
0
0
1.5 sec
1
0
1
0
0
0
0
2.0 sec
1
1
0
0
1
0
0
2.5 sec
1
1
1
1
0
0
0
3.0 sec
1
1
1
1
1
0
0
3.1 sec
Important: Use decimally addressed bit locations for PLC–5 processors.
Each channel has high and low alarm values associated with it. These bits and
words are explained in the bit/word definitions in Table 5.D.
You have the ability to calibrate this module using auto–calibration or by
manually setting the individual channel words. Words 20 through 27 in the
configuration word (Table 5.D) are the manual calibration words for channels 1
Channel Alarms
Calibration