6.4 T-Link Interface Card
6-63
Chap. 6
CONTROL OPTIONS
6.4.6.2 Protective operation function code
The following explains how to control the
er4
alarm when a light alarm occurs while an operation
command is given from MICREX via the T-Link.
[Operation Description]
The following describes an example of operation when operation and speed commands are given from
MICREX and a communication error occurs during operation.
*1 During this period of time, if communication recovers and new settings are not sent, commands (for
operation or speed, or both) received upon error occurrence are held.
(1) When function code o30 = 0
Er4
Communication error
Correct
ON
Normal
Transmission disabled due to communication error
ON
ON
Coast to stop
Correct
Transmission error
Display
FWD
FWD
Speed
command
Reference speed
(Accel/decel operation
internal processing)
Internal
setting of
FRENIC-VG
Command
from MICREX
Reference speed 3
(M51)
OFF
Alarm reset
ON
Figure 6.4.5
(2) When function code o30 = 1 and o31 = 5.0 (when a communication error occurs, the motor coasts to
stop in five seconds.)
Figure 6.4.6
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