FujiFilm FRENIC5000G11S Series, Technical Information

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2-60
Chapter 2
4. Standard RS-485 Interface
In a case of H32=3 (When a communication error occurs, the operation continues)
Normal
Error
Normal
Normal
Operation
ON
*1
ON
Internal
operation
of inverter
Command
from RS-485
Communication
state
Display
Operation
command
FWD
Output
frequency
Setting
frequency
Setting
frequency
Continue operation keeping the setting
at occurring transmission error
Warning
There is possibility that stop command through RS-485 cannot be recognized when a communica-
tion error causes while operating through RS-485. Be sure that an emergency stop is made possible
by using emergency stop of the external signal terminal (BX).
There is a fear of failure.
[1] Transmission error
In case of occurring transmission errors (communication error
codes 71 - 73) 8 times continually, error action is performed as
communication error.
1) Increment conditions of transmission error counter
- When a frame for own station
...... Communication error code 71
- When a receiving error (parity, framing, over run) occurs
...... Communication error codes 72, 73
(Because error receiving is limited to once per frame, the
errors occurring after errors of 15 times are not counted
till receiving next SOH)
2) Clearing condition of transmission error counter
When a check sum check of the frame for own or other
station was normal
[2] Communication interruption error
When the communication by this protocol stops, error action is
performed as communication error.
1) Setting time of communication interruption detection (H38)
0s (no detection), 1 - 60s
2) Clearing condition of communication interruption detection
When a check sum check of the frame for own or other
station was normal
NOTE:
*1) In a period until restoring the communication, the commands
(command data and operation data) just before the error are kept.
Chapter02J(P44˜74).p65
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