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The link function (communication function) provides
RS-485 (provided as standard) and bus connections
(optional).
The serial link function includes:
1) Monitoring (data monitoring, function data check)
2) Frequency setting
3) Operation command
(FWD, REV, and other commands for digital input)
4)Write function data
H 3 0 L I N K F U N C
Setting range: 0 to 3
Communication can be enabled and disabled by a digital
input. This function sets the serial link function when
communication is enabled.
Set value Frequency
command
Operation
command
0 Disabled Disabled
1 Enabled Disabled
2 Disabled Enabled
3 Enabled Enabled
The data monitoring and function data write functions are
always enabled. Disabling communication using digital
input brings about the same result as when "0" is set to this
function. When the bus option is installed, this setting
selects the function of the option and the RS-485 interface
is restricted to monitoring and writing function data.
These functions set the conditions of RS-485 Modbus-RTU
communication. Set the conditions according to the
upstream device. Refer to technical manual for the
protocol.
This function sets the station address of RTU.
H 3 1 4 8 5 A D R E S S
Setting range: 1 to 247
This function sets processing at communication error and
sets the error processing timer value.
H 3 2 M O D E O N E R
Setting range: 0 to 3
Set value Processing at communication error
0 Immediate Er 8 trip (forced stop)
1
Continue operation within timer time, Er8 trip
after timer time.
2
Continue operation and effect retry within timer
time, then invoke an Er8 trip if a
communication error occurs. If an error does
not occur, continue operation.
3 Continue operation.
H 3 3 T I M E R
Setting range: 0.0 to 60.0 seconds
This function sets the baud rate.
H 3 4 B A U D R A T E
Setting range: 0 to 3
Set value Baud rate
0 19200 bit/s
1 9600 bit/s
2 4800 bit/s
3 2400 bit/s
This function sets data length.
H 3 5 LENGTH
Setting range: 0
Set value Data length
0 8 bit
This function sets the parity bit.
H 3 6 PARITY
Setting range: 0 to 2
Set value Parity bit
0 None
1 Even
2 Odd
This function sets the stop bit.
H 3 7 STOP B I T S
Setting range: 0, 1
Set value Stop bit
0 2 bit
1 1 bit
The stop bit is automatically configured by the value of the
parity bit. For parity “NONE” the stop bit is 2bits. For
parity “EVEN” or “ODD” the stop bit is 1 bit.
In a system where the local station is always accessed
within a specific time, this function detects that access
was stopped due to an open-circuit or other fault and
invokes an Er 8 trip.
H 3 8 NO RES t
Setting range: 0 (No detection)
1 to 60 seconds
This function sets the time from when a request is issued
from the upstream device to when a response is
returned.
H 3 9 INTERV A L
Setting range: 0.00 to 1.00 second
H30 Serial link (Function select)
H31 RS-485 (Address)
H39 RS-485 (Response interval)