
18
Output status
Contents and Indication 3 - 4
Overscale: Measured value has exceeded Indication range high
limit value. " " flashes. Open
Underscale: Measured value has dropped below Indication range
low limit value. " " flashes. Open
DC input
Indication range : [Scaling low limit value – Scaling span x 1%] to [Scaling high limit value
+ Scaling span x 10%]
However, if the input value is out of the range –1999 to 9999, the PV
display flashes “ ” or “ ”.
Control range : [Scaling low limit value – Scaling span x 1%] to [Scaling high limit value
+ Scaling span x 10%]
DC input disconnection: When DC input is burnt out, PV display flashes “ ” for 4
to 20mA DC and 1 to 5V DC inputs, and “ ” for 0 to 1V DC input.
For 0 to 20mA DC, 0 to 5V DC and 0 to 10V DC inputs, the PV display
indicates the value corresponding to 0mA or 0V input.
[Warm-up indication]
After the power supply to the instrument is turned on, the PV display indicates input type,
and the SV display indicates scaling high limit value for 3 seconds.
[Peak (or Bottom) value hold function]
While the EXCEEDED indication (the PV display flashes) continues, the peak value is maintained
during high limit action, or Bottom (the lowest) value is maintained during low limit action.
Present measured value will be initialized after reset using the RESET key or the external
reset input function.
[EXCEEDED indication duration time]
EXCEEDED indication duration time (the PV display flashes) can be measured and indicated
by pressing the Mode ( ) key in the PV/SV display mode.
Measurement range: 0:00 to 99:59 (Hour:Minute, Minute:Second)
Duration time will be initialized to 0:00 after reset with the RESET key or the external reset
input function.
Accessories included : Instruction manual 1 copy
Wire harness 3m 1 length (When DI option is added)
Accessories sold separately: 50 shunt resistor for DC current input 1 piece
10.2 Optional specifications
Serial communication (Option code: C5)
The following operations are performed from external computer.
(1) Reading and setting of the SV, PID and other various set values
(2) Reading of the PV and action status (3) Function change
Cable length : Maximum 1,200m, Cable resistance: Within 50
Communication interface : EIA RS-485
Communication method : Half-duplex communication
Synchronization method : Start-stop synchronization
Communication speed : 2400/4800/9600/19200bps (Selectable by keypad)
Parity : Even/Odd/No parity (Selectable by keypad)
Stop bit : 1 or 2 (Selectable by keypad)
Communication protocol : Shinko protocol/Modbus RTU/Modbus ASCII (Selectable by keypad)
Communication protocol Shinko protocol Modbus ASCII Modbus RTU
Start bit 1 1 1
Data bit 7 7 8
Parity Even Selection (Even) Selection (No parity)
Stop bit 1 Selection (1) Selection (1)
Data bit is automatically switched upon selecting the communication protocol.
( ): Basic set value
Number of connectable units : A maximum of 31 units per host computer
Communication error detection: Dual detection by the parity and checksum
External reset input (Option code: DI)
If External reset input is closed while the RESET indicator is lit, the RESET indicator goes off,
limit control output (terminals between 3-4) is turned ON, and limit control action initiates.
Reset is impossible for the following conditions:
SV PV for High limit action
SV PV for Low limit action
However, while the EXCEEDED indication continues, limit control action does not initiate even though
External reset input is closed.
Data format