233
Errors and Alarm Troubleshooting Section 7-1
70 Illegal combina-
tion of function
blocks
The function block on the pri-
mary loop side is not basic
PID or advanced PID when
bumpless processing
between primary/secondary
loops was specified in basic
PID or advanced PID.
Running of the function block
in question is stopped.
Check the function block
model number on the primary
loop side.
The block address specified
as the master is not set to
Segment Program 2 (Block
Model 157) even though syn-
chronous operation is set for
Segment Program 2 (Block
Model 157).
The slave's initial output
value is not changed and
operation does not start.
Specify the block address for
Segment Program 2 in the
master.
The Segment Program 2
block specified as the master
was deleted during execu-
tion of Segment Program 2
(Block Model 157).
The slave's output value is
held.
Specify the master correctly.
The block address of the
same Segment Program 2
(Block Model 157) block is
set in the “synchronous oper-
ation reference parameter
designation” (i.e., the Seg-
ment Program 2 block is set
as its own master).
The initial values are not
changed and operation does
not start.
Specify the correct block
address in the “synchronous
operation reference parame-
ter designation.”
A Basic PID block (Block
Model 011) or Advanced PID
block (Block Model 012) is
not set as the “source desig-
nation of PID block's MV out-
put” for Split Converter (Block
Model 169).
The initial values are not
changed and operation does
not start.
Specify a Basic PID block
(Block Model 011) or
Advanced PID block (Block
Model 012) for the “source
designation of PID block's
MV output.”
With the Segment Program 3
block (Block Model 158), the
function block with the block
address set in the target PID
block's address (ITEM 041) is
not a Basic PID or Advanced
PID block or 000 (not speci-
fied).
The program does not start.
Program outputs do not oper-
ate at the default settings.
Check the settings for the tar-
get PID block's address
(ITEM 041).
With a Basic PID block (Block
Model 011) or Advanced PID
block (Block Model 012), the
remote SP source designa-
tion is not the Segment Pro-
gram 2 or Segment Program
3 program output value
(ITEM 008) when PV lag off-
set correction (ITEM 110) is
enabled.
PID control is executed with
no PV lag offset correction.
Either disable PV lag offset
correction (ITEM 110) for the
Basic PID block (Block Model
011) or Advanced PID block
(Block Model 012), or set the
remote SP source designa-
tion (ITEM 021) to the Seg-
ment Program 2 or Segment
Program 3 program output
value (ITEM 008).
Code Description Explanation Operation at error Remedy
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