Mitsubishi A1SD75M1, User Manual

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13 - 11
MELSEC-A
13 COMMON FUNCTIONS
13.5 Clock data function
"The clock data function" utilizes the PLC CPU clock data in the AD75.
This clock data is used to monitor the various history data. The clock data is controlled
in 0.1 second units in the AD75 to simplify the measurement of cycle time, etc.
The details shown below explain about the "clock data setting function".
(1) Precautions during control
(2) Setting the clock data
(1) Precautions during control
(a) Set the clock data every time the PLC CPU is started. If the clock data is not
set, counting will begin as "00 hours 00 minute 00 seconds" when the AD75
starts.
(b) The AD75 clock data count value is less accurate that the PLC CPU clock
data. Therefore, synchronize it with the PLC CPU clock data about once a
day.
(c) Data indicating the "date" in the PLC CPU clock data will be ignored.
(2) Setting the clock data
The following shows the setting data and sequence program example for reading
the PLC CPU clock data and setting it in the AD75.
(a) Set the following data.
(The setting is carried out using the sequence program shown in section (b)
on the next page.)
Buffer memory address
Setting item
Setting
value
Setting details
Axis 1 Axis 2 Axis 3
Cd.1
Clock data setting
(hour)
Set the PLC CPU clock data (hours). 1100
Cd.2
Clock data setting
(minute, second)
Set the PLC CPU clock data
(minutes, seconds).
1101
Cd.3 Clock data writing 1 Set "1" (clock data write request). 1102
* Refer to section "5.7 List of control data" for details on the setting details.