Monitoring (Reading) Measurement Values - Omron K7GE-MG User Manual

6 Remote Monitoring
6-4 Monitoring (Reading) Measurement
Values
Read the measurement values and statuses using the Read Variable Area command.
The Read Variable Area command can read
single specified addresses one by one, but it can
also read multiple addresses together by
specifying an area. The latter case is convenient,
as the read operation can be completed with one
command/one response.
The area to specify is H'0001 to H'0013. Refer to 6-3 Variable Area Map on page 6-5.
Read Timing
If the load stop time schedule is predetermined,
the read timing considers when measurement is
clearly complete, including the time taken from
load stop to measurement.
(For example, 1 hour after load stop.)
For applications with irregular load stop timing,
such as a duplex alternating pump, the simplest
method is to read the measurement values at a
relatively short cycle (for example, every 10
minutes), and then discard the data if the
measurement value is not a confirmed
measurement value.
In the unconfirmed state, the read measurement
value is H'0000 and this is used to determine if the
data is valid data.
However, strictly speaking, the measured result could be 0.0 MΩ (H'0000). Therefore, for better
determination accuracy, also consider whether or not the alarm is ON. If the measured result is 0.0 MΩ,
the alarm is always ON.
Normally, the confirmed measurement values as a result of a measurement are retained until the next measurement
starts. However, if manual measurement is performed or if the level is switched to the Initial Setting Level by a key
operation on the front part of the K7GE-MG, the value is cleared even if reading is not yet performed.
Take care when making a key operation before reading.
6 - 8
Host system
Reading variable area Read Variable
Area command
H'0001 to H'0013
K7GE-MG
Month/Day Month/Day + 1 day
20:00
Load
(motor)
OFF
Measurement
operation
Measurement
Confirmed measurement value
value
Reading
e.g., 1 hour
Month/Day Month/Day + 1 day
20:00
Load
(motor)
OFF
Measurement
operation
Measurement
Confirmed measurement value
value
Reading
e.g., 10 minutes
Insulation Resistance Monitoring Device User's Manual (N224)
Values of
H'0001 to
Response
H'0013
Month/Day + 2 days
8:00 20:00 8:00
Confirmed measurement va
Month/Day + 2 days
8:00 20:00 8:00
Confirmed meas