Micromod MOD: 30ML Functions Data Base Reference - Manual (Page 138)

MOD 30ML Functions
CONFIGURATION EXAMPLES
c. Upon completion of required changes for each block, click on the Enter button to
input configured values and return to the workspace display.
4. Make connections to the CJC compound as described in the next section.
Connecting Inputs and Outputs
The required inputs to the CJC compound are:
• Thermocouple signal from the process and
• RTD signal from the cold junction temperature sensor.
These inputs are obtained from the hardware connections at the instrument terminal block.
Make CJC input and output connections as follows:
1. Access the workspace display where you wish to make the connections.
2. From the tool bar, select either the visible connection or wireless connection icon.
3. If the instrument has more than one thermocouple input module, connect the cold junction
compensation signal to the other thermocouple inputs as follows:
a. If Option 1 has been chosen, connect MODOUT of RIM1 to CJCIN of each additional
thermocouple input module block.
b. If Option 2 has been chosen, connect MODOUT of TI2 to CJCINP of each additional TI
block.
4. Connect CJC compound outputs to other blocks in the strategy as required. Be sure to make
the connections to the option you chose in the previous section. The attributes of each block
in the compound are available as outputs. Typical output connections are as follows:
• Result (R) of the TI1 or TI2 block is connected to the process variable (PV) input of a PID
block for temperature control.
• Result (R) of the RTI2 block is connected to a display block in a MOD 30ML instrument, or to
an MSC or ICN block in a MODCELL instrument.
5. After completion of all connections, it is recommended that the database be compiled to
check the validity of the CJC configuration.
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