Communication Considerations; About Communication Interval; Access To Non-Existent Data; Special Data - YOKOGAWA SMARTDAC+ GP10 User Manual

Communication Considerations

About Communication Interval
Access to Non-existent Data
Special data
Writing Data to the Recorder
IM 04L51B01-18EN
Data Update
The recorder data is updated in a scan interval. Even if a PLC accesses the data at shorter
intervals than the recorder scan intervals, the data is updated only at scan intervals.
Communication Interval
A PLC should access the recorder at intervals of 100 ms or longer.
* This is required to maintain compatibility with other protocols supported by the recorder
than EtherNet/IP.
If non-existent data is accessed, either of the following operations occur.
• 0 is read if non-existent data is read.
• Nothing is done if non-existent data is written.
Special data will have the following values:
Channel status
+Over, +Burnout
–Over, –Burnout
Example: Channel status is "–Over"
Data type
Int16
Int32
Float
Input value
More than 99999999
–9999999 to 99999999
Less than –9999999
Integer (Int)
Maximum expressible value
Minimum expressible value
Output value
–32768 (0x8000)
–2147483648 (0x80000000)
– (0xff800000)
Recorder value
+Over
The data is written without change.
–Over
Data type
Floating (Float)
+
–
31