YOKOGAWA PR720, Руководство пользователя

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IM 77C01E31-01EN
SFLC-212-181
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6.3 Input/output functions
Item Specification
Communication
output
Standard EIA RS-485
Protocol
Modbus protocol RTU mode
RTU: Remote Terminal Unit
(Monitor operating unit)
PI-MBUS- 300 Rev.J
Modbus Application Protocol
specification V1.1b
Use function code 03H , 04H, 06H, 08H
Transmission system Half duplex two-wire system
Synchronous system asynchronous communication method
Transmission rate 4800bps / 9600bps / 19200bps / 38400bps
Line code NRZ
Start bit 1 bit
Data length 8 bit
Parity bit
NONE (Nothing) / ODD (Odd number) /
EVEN (Even number)
Stop bit 1 bit / 2 bit
Transmission code Binary
Cable length 1000m
Address 1 to 247
The number of connection
Max. 31 sets
Error detection CRC-16 X 16 +X 15 +X 2 +1
Topology Multidrop
Please reference to the Model PR720 Power and Energy Meter Modbus RTU Mode Protocol User’s Manual
( IM 77C01E31 -10EN) for the details of communication output data.
Pulse output
Possible output : Watt-hour or var-hour.
Output form : Optical MOS-FET relay. 1a contact
Contact capacity: AC, DC1 25V , 70mA (Resistance load, inductive load)
Pulse width : 250±10ms (Output pulse width when the output pulse period of rated active power
constitut es speed more than 2 pulse/s econd by setting of an voltage measurement
range, a current-measurement range, and an output pulse unit is set to 100 to 130ms.)
Setting of output pulse unit is possible by the next range.
■ 3 - phase 3 -wire : Full load power (kW, kvar)= √
3
×Rated voltage(V)×Rated current(A)×10 - 3
■ Single - phase 3 -wire: Full load power (kW, kvar)= 2 ×Rated voltage(V)×Rated current(A)×10 - 3
■ Single - phase 2 -wire: Full load power (kW, kvar)=Rated voltage(V)×Rated current(A)×10 - 3
Full load power (kW, kvar) Output pulse unit. kWh(kvarh)/puls e Multiplying factor
Below 1 0.1 0.01 0.001 0.0001 0.01 ( 2 6 )
Over 1 Below 10 1 0.1 0.01 0.001 0.1
Over 10 Below 100 10 1 0.1 0.01 1
Over 100 Below 1,000 100 10 1 0.1 10
Over 1,000 Below 10,000 1,000 100 10 1 100
Over 10,000 Below 100,000 10,000 1,000 100 10 1,000
Over 100,000 Below 1,000,000 100,000 10,000 1,000 100 10,000
Alarm output
Alarm factor: Demand current, Demand power, Voltage, Alarm OFF. Possible to setting one of them.
Reset method: Automatic reset or Manual reset (Setting)
Output contact : No-voltage a contact (OR of each phase detection)
Contact capacity: AC250V 5A, DC1 25V 0.3A (Resistance load ) AC250V 2A, DC125V 0.1A (Inductive
load)
Alarm factor Item Specification
Demand
current,
Demand power
Function
Demand measurement value
≧
Upper limit setting value,
Alarm display, Alarm output.
Setting accuracy ±0.5 % (% for full scale )
Setting range 5 to 100% to the maximum scale. (1% step)
Voltage
Function
Measurement value
≧
Upper limit setting value,
Alarm display, Alarm output.
Measurement value
≦
Lower limit setting value,
Alarm display, Alarm output.
Setting accuracy ±0.5 % (% for full scale)
Setting range Using a full scale as 150%. 30 to 150% (1% step)
Note( 26 ) Although multiplying factor is 0.01, a multiplying factor display will be 0.1.
(The place by the integer is 4 digits display. An enlarged display is 4 digits below decimal point.)