Shihlin SDH Series, Руководство пользователя

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194
SDH Series Manual
(c)Checksum
The checksum is the code which is used by the programmable controller to check for errors in the received
absolute position data. The 6-bit checksum is transmitted following the 32-bit absolute position data. Every time
the programmable controller receives 2 bits of absolute position data, it adds the data to obtain the sum of the
received data. The checksum is 6-bit data.
(Example)ABS data
：
-30000 (FFFF8AD0)
，
the checksum of is 22H
。
(3) Transmission error
：
[AL.17 ABS time-out warning]
In the ABS transfer mode, the servo drive processes time-out below, and displays [AL. 17] when a time-out error
occurs.
(1)ABSR request off-time time-out check
If the ABS request signal is not turned on by the programmable controller within 5 s after ABST is turned on,
this is regarded as a transmission error and [AL. 17 ABS time-out warning] is output.