Rockwell Automation 61C544A RTD Module - Manual (Page 34)

4Ć18
The RTD module is connected to a4Ćwire RTD in this example. Three
vats of solution are being monitored for the following temperatures:
D High High Alarm = 250_C
D High Alarm = 200_C
D Low Alarm = 100_C
D Low Low Alarm = 50_C.
The sample program uses the following memory locations:
Bit 00.00
= Bit to be set by the user when achannel is to be
configured.
Bit 1700.00 = Bit used to detect the rising edge of Bit 00.00.
Register 10 = Register contains the coils corresponding to the
status of the RTD High High alarms.
Register 11 = Register contains the coils corresponding to the
status of the RTD High alarms.
Register 12 = Register contains the coils corresponding to the
status of the RTD Low alarms.
Register 13 = Register contains the coils corresponding to the
status of the RTD Low Low alarms.
Register 1600= Internal coils
Register 1601= Internal coils
Register 1610= The register's bits are used to indicate the status of
operation.
Bit .00 represents state 0 which writes the READY
command to the RTD module and then reads the
module's configuration status. If the complete bit of
the configuration status register is equal to zero,
advance to state 1.
Bit .01 represents state 1 which reads channel
configuration data from the AutoMate's memory and
writes out to the RTD module. State 1 then reads the
RTD module's configuration status. If the
configuration is complete and there are no errors,
go to state 2.
Bit .02 represents state 2. This state directs the
program to continue with the configuration of the
next channel (state 0), provided no errors have
been detected.
Bit .16 is set when an error is detected and the
configure operation is aborted.
Bit .17 is set when all of the RTD channels have
been configured.
Register 1611= Register is loaded by the REMIN instruction which
contains the contents of the RTD Configuration
Status Register (Register 22).
Register 3000= Register contains the pointer to the data that is to be
written to the RTD module.
Register 3001= Register contains the RTD channel number that is
being configured.
Register 3002= Reserved for future use.