81
560
N2 override release time
(N2 OVER.REL.TIME)
Value:
1 - 65533 sec.
★
OFF
Function
The maximum time is set between the receipt of two N2 messages. If the
time is exceeded, serial communication is assumed stopped. All N2
points which are overridden will be released in the following order:
1. Analog outputs
2. Binary outputs
3. Internal floating points
4. Internal integer points
5. Internal byte points
N2 point addresses are released in numerical order beginning with 1
(or 0).
Description of choice:
Set the required time.
565
FLN bus time interval
(FLN TIME INTER.)
Value:
1 - 65534 sec.
★
60 sec.
Function
The maximum time is set between the receipt of two FLN messages. If
the time is exceeded, serial communication is assumed stopped and
the required reaction is set in parameter 566,
FLN Bus Time Interval
Function.
Description of choice:
Set the required time.
566
FLN bus time interval function
(FLN TIME FUNCT.)
Value:
★
Off (NO FUNCTION)
[0]
Freeze output (FREEZE OUTPUT)
[1]
Stop (STOP)
[2]
Jogging (JOG FREQUENCY)
[3]
Max. output frequency (MAX.SPEED)
[4]
Stop and trip (STOP AND TRIP)
[5]
Function
The required reaction from the variable frequency drive is selected
when the time set in parameter 565,
FLN Bus Time Interval
, has been
exceeded.
Description of choice:
The output frequency of the variable frequency drive can be frozen at
the present value at any given time, frozen at parameter 211,
Preset
Reference 1
, frozen at parameter 202,
Max. Output Frequency
, or
stop output and show a fault.
✭
I
ndicates factory default setting. Numbers in brackets [ ] represent selection as displayed on the serial bus.
570
Modbus parity and message framing
(M.BUS PAR./FRAME)
Value:
Even parity (EVEN / 1 STOPBIT)
[0]
Odd parity (ODD / 1 STOPBIT)
[1]
★
No parity (NO PARITY / 1 STOPBIT)
[2]
Function
This parameter sets the drive Modbus RTU interface to communicate
properly with a master controller. The parity (even, odd, or no parity)
must be set to match the setting of the master controller. Even and odd
parity is sometimes used to allow error checking of a transmitted word.
Description of choice
Because Modbus RTU uses the more efficient CRC (cyclic redundancy
check) method for checking for errors, parity checking is seldom used
in Modbus RTU networks. Set the drive parity to match the master
controller, if appropriate.
571
Modbus communication timeout
(M.BUS COM.TIME.)
Value:
10 ms to 2000 ms
★
100 ms
Function
This parameter determines the maximum time that the drive will wait
between characters sent by the Modbus RTU master controller. When
the time expires, the drive assumes it has received the entire message.
Description of choice
Generally, the value of 100 ms is sufficient for Modbus RTU networks,
although some Modbus RTU networks may operate with a timeout
value as short as 35 ms. If the value is set too short, the drive may miss
part of the message. Since the CRC check will be invalid, the drive will
ignore the message. The resulting retransmission of messages will slow
network communications. A value set too long will cause the drive to
wait longer than necessary to determine that the message is complete.
This delays response time and could cause the master controller to
timeout or slow the network.
