Mitsubishi Electric FR-A5NR Instruction Manual page 29

COMPUTER LINK FUNCTION
Line number
10
I/O file initial setting
40
50
Transmission data
processing
Data setting
Sum code calculation
Data transmission
140
Programming instructions
1) The inverter does not accept data from the computer if it has an error. For this reason, a retry program for
data error must be included in the user program.
2) A request of any data communication, e.g. operation command, monitoring, is always given by the com-
puter and the inverter will return data to the computer. Hence, the program should be written to give a
data read request as required from the computer at the time of monitoring, etc.
When the inverter's communication check time interval is not set, switching to computer link
operation causes any of "E.OP1 to E.OP3" to occur. Always set the communication check time
interval before starting operation.
Data communication is not started automatically but is made only once when the computer
provides a communication request. If communication is disabled during operation due to sig-
nal cable breakage etc., the inverter cannot be stopped. When the communication check time
interval has elapsed, the inverter will come to an alarm stop (E.OP1 to E.OP3). (Pr. 336≠ ≠ ≠ ≠ 9999)
The inverter can be coasted to a stop by switching on its RES signal or by switching power
off.
If communication is broken due to signal cable breakage, computer fault etc., the inverter
does not detect such a fault. This should be fully noted.
1000
Receive data processing
Interrupt
Data import
Screen display
1040
CAUTION
23