Micromod MOD: 1726F Output holder for MOD 30ML User Manual

Page 13

Using The Output Holder With MOD 30ML

MOD 30ML Application

menu will appear with the tag name you gave the output holder compound. Select
that tag and hit “OK”. A new menu will appear with the attribute “RUNINIT” in it.
Select “RUNINIT”. The connection is now complete. Release the connection tool by
clicking the right mouse key.

12. Double click on the oval loop block to return to the compound block. Enter all of the

necessary engineering values in the Input Conditioning and PID blocks.

NOTE: Caution must be exercised if reassigning I/O in the output holder strategy. The

execution order for the blocks of this strategy are specific for the configuration to
work properly. Table 2 shows an example of block execution order.

Table 2. Block Execution Order

Tag Name

Type

Exec

Occur

AIN

pv_i

VCI

RETURN

AIN

SENSE

DIM

RETURNF1

VCI

SENSF

#001

CIB

OP_T_LGC

pid

PID

op_ao

AOUT

disp

DISP

TL_ctrl

Notes

DESC

Note that the process variable input, Return input, Sense input, and OP_T_LGC
expression block must run prior to the PID block. The Return and Sense inputs must run
prior to the OP_T_LGC expression block. The PID block must run prior to the analog
output. If using the PID and Output Holder compound and making new I/O assignments,
be sure the block execution order is as shown in Table 2.

Block execution order can be altered using the Execution/Occurrence tool

located on

the top menu, left side.

1. Click once on the

tool and select “manual”. A table will appear that shows the

execution order and occurrence numbers.

2. Change the block execution order by selecting the execution order field next to the

block you wish to change and entering the appropriate execution values. Remember
that no two blocks can have the same execution order number. If you change one
block to read an execution order number that is currently assigned to that of another
block you must also change the original block with that number.