DA70131-1/3E
I-13
4-4-18.
_______
MERR
This is a monitor terminal to confirm communication control status.
When the center device receives an error response frame, this terminal outputs L level signal only for 0.2 seconds.
The error response frame is as follows:
A local device normally receives signals from the center device if there is no CRC error on the local device.
However, it may possible that the received data do not match with the local device status (such as receiving output
data on the input port). (It may possible because of the mistakes from the CPU.)
In this case, the local device sends back the data to the center device in order to notify the center device that the
received data is useless.
This is error response frame.
Other case is that a local device sends data longer than 128 bytes to a PCL device (G9103A 128 bytes FIFO), and
the PCL device returns receipt process error (format error).
4-4-19. MSYN
This is a monitor output of cyclic communication cycle.
Each time a cyclic communication cycle ends, this signal level changes between L and H.
Содержание Motionnet G9001A
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