Omron CQM1H series - Application Examples; Basic Program for Temperature Control Unit

267
Output Interface
Maximum switching capability 100 mA, 24 VDC
+10%
/
–15%
Leakage current 0.3 mA max.
Residual voltage 3.0 V max.
External supply voltage 15 mA min., 24 VDC
+10%
/
–15%
(excluding load current)
Output Circuits
CQM1-TCj01 (NPN) CQM1-TCj02 (PNP)
+DC
OUT
COM
COM
OUT
0 V
3-5 Application Examples
3-5-1 Basic Program for Temperature Control Unit
The contents of DM 0000 are written to the Temperature Control Unit as the set
point.
The process value is read from the Temperature Control Unit and written to DM
0001. If an error has occurred, however, the value written to DM 0001 will be
treated as an error code.
Temperature Control Unit input word IR 001
Temperature Control Unit output word IR 100
Set point storage word DM 0000
Process value storage word DM 0001
Initialization End Flag IR 01600
CMP(20)
#FFFF
001
END(01)
25313
01600
25506
01600
MOV(21)
DM0000
100
MOV(21)
001
DM0001
Always ON Flag
(=)
If the process value (contents of IR 001) is not
FFFF, IR 01600 is turned ON to indicate that
initialization has been completed.
If IR 01600 is ON, the contents of DM 0000 will
be written as the set point to IR 100.
If IR 01600 is ON, the contents of IR 001 will
be read to DM 0001 as the process value.
The contents of IR 001 is compared to FFFF to
confirm that the Temperature Control has com-
pleted initialization processing. (See note 3)
Note 1. Write a program for control loop 2 in the same way.
2. The contents of both DM 0000 and DM 0001 are four-digit BCD except that
an F in the leftmost digit is used to indicate negative values. The meaning of
Output Characteristics
Operation (for Control Loop
1 Only)
Word/Bit Allocations (for
Control Loop 1 Only)
Application Examples
Section 3-5