C40K-CDR-A Omron, C40K-CDR-A Datasheet - Page 101

• Manufacturer Part Number: C40K-CDR-A
• Description: PROGRAMMABLE CONTROLLER CPU
• Manufacturer: Omron

Specifications of C40K-CDR-A

• Leaded Process Compatible: No
• Peak Reflow Compatible (260 C): No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Timer and Counter Instructions
5-11-4
90
Limitations
Description
Precautions
Flags
COUNTER – CNT
Each TC number can be used as the definer in only one timer or counter in-
struction.
CNT is used to count down from SV when the execution condition on the
count pulse, CP, goes from OFF to ON, i.e., the present value (PV) will be
decremented by one whenever CNT is executed with an ON execution condi-
tion for CP and the execution condition was OFF for the last execution. If the
execution condition has not changed or has changed from ON to OFF, the
PV of CNT will not be changed. Counter is turned ON when the PV reaches
zero and will remain ON until the counter is reset.
CNT is reset with a reset input, R. When R goes from OFF to ON, the PV is
reset to SV. The PV will not be decremented while R is ON. Counting down
from SV will begin again when R goes OFF. The PV for CNT will not be reset
in interlocked program sections or for power interruptions.
Changes in execution conditions, the completion flag, and the PV are illus-
trated below. PV line height is meant to indicate changes in the PV only.
Program execution will continue even if a non-BCD SV is used, but the SV
will not be correct.
ER:
Execution condition
on count pulse (CP)
Execution condition
on reset (R)
Completion flag
PV
Ladder Symbol
SV is not in BCD.
ON
OFF
ON
OFF
ON
OFF
CP
R
SV
CNT N
SV
SV - 1
SV - 2
SV: Set value (word, BCD)
Operand Data Areas
Definer Values
# (00 through 47)
N: TC number
0002
IR, HR, #
0001
Section 5-11
0000
SV