User Manual

123
Serial communication
(C5W, C5 options)
The following operations can be carried out from an external computer.
Serial communication and Console communication cannot be used
together.
(1) Reading and setting of the SV, PID values and various set values
(2) Reading of the PV and action status
(3) Function change
Cable length: Max 1.2km, Cable resistance: Within 50 (Terminators are
not necessary, but if used, use 120 or more on both
sides.)
Communication line: EIA RS-485
Communication method: Half-duplex communication
Synchronization method: Start-stop synchronization
Communication speed: 9600/19200/38400 bps (Selectable by keypad)
Data bit/Parity: 7 bits, 8 bits/Even, Odd, No parity (Selectable by keypad)
Stop bit: 1 bit, 2 bits (Selectable by keypad)
Communication protocol: Shinko protocol/Modbus ASCII/Modbus RTU
(Selectable by keypad)
Data format:
Communication
protocol
Shinko
protocol
Modbus ASCII
Modbus RTU
Start bit
1
1
1
Data bit
7
7 or 8
8
Parity
Yes (Even)
Yes (Even, Odd),
No parity
Yes (Even, Odd),
No parity
Stop bit
1
1 or 2
1 or 2
Number of connectable units: Maximum 31 units to 1 host computer
Communication error detection: Parity, checksum (Shinko protocol),
LRC (Modbus ASCII), CRC-16 (Modbus RTU)
Digital external setting:
Receives digital SV from Shinko programmable controllers
(PC-900, PCD-33A with SVTC option).
External setting input
(EIT option)
SV adds external analog signal to remote bias value.
Not available for Program control.
Setting signal: 4 to 20 mA DC
Allowable input: 50 mA DC max.
Input impedance: 50 max.
Input sampling period: 125 ms
Transmission output
(EIT option)
Converting the value (PV, SV, MV or DV transmission) to analog signal
every 125 ms, outputs the value in current or voltage.
Outputs Transmission output low limit value if Transmission output high
limit and low limit value are the same.
Resolution: 12000
Output: 4 to 20 mA DC (Load resistance: Maximum 550 )
Output accuracy: Within 0.3% of Transmission output span
Insulated power output
(P24 option)
Output voltage: 24 3 V DC (when load current is 30 mA DC)
Ripple voltage: Within 200 mV DC (when load current is 30 mA DC)
Max. load current: 30 mA DC