Omron DRT2 Series Operation Manual page 73

Remote I/O Terminal and Environment-resistive Terminal Functions
56
• Measuring unit: ms
Measured
time
Output contact A
(Example: Cylinder)
Input contact B
(Example: Sensor)
Note 1. The Operation Time Monitor can be used only with Slaves that consist of
a Basic I/O Unit and an Expansion Unit and also provide both inputs and
outputs. When the input and output numbers are the same (for example,
input No. 1 and output No. 1, or input No. 8 and output No. 8) the time is
measured from when the output changes to ON to when the input changes
to ON.
2. The Operation Time Monitor Flag is refreshed in real time, so even when
the set monitor value is exceeded and the Operation Time Monitor Flag is
turned ON, the flag will turn OFF without being held if the time from when
the next output changes to ON until the input changes to ON is within the
set monitor value range.
To precisely monitor when the monitor value is exceeded, set the flag in-
formation to be held in the ladder program.
Input
Output
Operation Time Flag
3. The operating time is recorded as soon as the time has been measured
from when the output changes to ON to when the input changes to ON.
The time until the next output changes to ON, however, continues being
measured internally, and the measurement value will be refreshed if the in-
put changes to ON again before the next output changes to ON. (When an
input occurs during the operation time for a reciprocating operation such
as a cylinder, the measurement for the operating time (outward path) may
be refreshed during the return time (return path).
When an output changes to ON twice consecutively, and is followed by the
input changing to ON, the time is measured from when the second output
Slave
Operating
time
Recorded in
Slave
Input contact B
(Example: Sensor)
ON
OFF
ON
OFF
Measured time
ON
OFF
ON
OFF
Monitor value
exceeded
ON
OFF
Section 4-3
Output contact A
(Example: Cylinder)
Problem?
The robot is operating
abnormally.
Within monitor
value range