61
Serial communication
Cannot be used with Tool port communication. If this option is added, Contact input option cannot be added.
The following operations can be carried out from the external computer.
(1) Reading and setting of the SV, PID values and various set values
(2) Reading of the PV and action status
(3) Function change
Communication line
: EIA RS-485
Communication system
: Half-duplex communication start-stop synchronous
Cable length
: Maximum communication distance 1,000m
Cable resistance: Within 50
(The terminator is not necessary or
120
or more on the PLC side.)
Communication speed
: 9600 (2400, 4800, 9600, 19200bps) Selectable by key (Default: 9600bps)
Data bit/Parity
: 7 bits/Even parity (7 bits, 8 bits/Even, Odd, No parity)
Selectable by key
(Default: 7 bits/Even parity)
Stop bit
: 1 (1 or 2)
Selectable by key (Default: 1)
Communication response time : 5 to 99ms
Communication protocol
: Modbus ASCII (Modbus ASCII/Modbus RTU/MEWTOCOL)
Selectable by key (Default: Modbus ASCII)
Continuous data reading and writing are not available for MEWTOCOL.
Only RD and WD commands are usable in MEWTOCOL.
Data format
Communication protocol
Modbus ASCII
Modbus RTU
MEWTOCOL (Slave)
Start bit
1
1
1
Data bit
7 or 8
8
7 or 8
Parity
Yes (Even, Odd)
No parity
Yes (Even, Odd)
No parity
Yes (Even, Odd)
No parity
Stop bit
1 or 2
1 or 2
1 or 2
Number of connectable units : Maximum 31 units to 1 host computer
Error detection (*)
: Parity,
LRC (Modbus ASCII), CRC-16 (Modbus RTU), BCC (MEWTOCOL)
Error correction
: Command request repeat system
Instrument number (Address): 1 (1 to 99)
Settable by key
Code form (*)
: ASCII (Modbus ASCII, MEWTOCOL), binary (Modbus RTU)
(*) This is automatically switched upon selecting the communication protocol.
Contact input
If this option is added, Serial communication option cannot be added.
SV, SV2, SV3, SV4 or OUT/OFF function can be switched by external contact.
If “Set value memory external selection” or “OUT/OFF external selection 1 (SV, SV2 can be switched)” is selected
during “Contact input function selection”, the MEMO display indicates the selected memory number.
Actions depend on the selection of OUT/OFF key function and Contact input function as follows.
When OUT/OFF function ([52]
in the Setup mode) is selected
Connecting terminal number
Contact input function: [50] in the Setup mode
Between 17-18
(DI1-COM)
Between 16-18
(DI2-COM)
Set value memory external
selection (
)
OUT/OFF external
selection 1 (
)
OUT/OFF external
selection 2 (
)
Open
Open
SV
SV
Closed
Open
SV2
SV2
SV
Open
Closed
SV3
Closed
Closed
SV4
Control output OFF
Control output OFF
When Auto/Manual control function ([52]
in the Setup mode) is selected
Connecting terminal number
Contact input function: [50] in the Setup mode
Between 17-18
(DI1-COM)
Between 16-18
(DI2-COM)
Set value memory external
selection (
)
OUT/OFF external
selection 1 (
)
OUT/OFF external
selection 2 (
)
Open
Open
SV
SV (Automatic control)
Closed
Open
SV2
SV2 (Automatic control)
SV
(Automatic control)
Open
Closed
SV3
Closed
Closed
SV4
Manual control
Manual control
Circuit current when closed
: Approx. 6mA
Internal circuit
:
When a transistor is used as an external
contact, use Max. 18V or more voltage.