Harsen GU320a - Central Pick-up Control Unit Communication Protocols

GU320a Controller Manual
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10.3 Central Pick-up Control Unit Communication Protocols
RS485 mechanism is a kind of network form by character signal between the computer and hardware
device. Controller working baud rate is 9600-Baud, communication protocol is MODBUS-RTU. When it is
working, the computer will send out a serial orders to the central pick-up controller, and then wait the reflect
data block..
NOTE: max byte (word) of write/read, read is 16, write is 14. Only continuous write order 10(hex)
could be used for write .
Controller Data Cell Address
Address Byte Content Unit
$1000 1 L3-N Voltage Ph-c phase voltage
unit：V
$1001 1 L2-N Voltage Ph-B phase voltage
unit：V
$1002 1 L1-N Voltage Ph-A phase voltage unit：V
$1003 1 L3-L1 Voltage AC phase and line voltage
unit：V
$1004 1 L2-L3 Voltage BC phase and line voltage
unit：V
$1005 1 L1-L2 Voltage AB phase and line voltage
unit：V
$1006 1 L3 Current Ph-c phase current
unit：A
$1007
1
L2 Current ph-B phase current
unit：A
$1008
1
L1 Current ph-A phase current
unit：A
$1009
1
L3 PF ph-c PF
$100A
1
L2 PF ph-B PF
$100B
1
L1 PF ph-C PF
$100C
1
Frequency Generator frequency
unit：0.1HZ
$100D
1
L3 VA Ph-C real power
unit：KVA
$100E
1
L2 VA Ph-B real power
unit：KVA
$100F
1
L1 VA Ph-A real power
unit：KVA
$1010
1
L3 W Ph-C active power
unit：KW
$1011
1
L2 W Ph-B active power
unit：KW
$1012
1
L1 W Ph-A active power
unit：KW
$1013
1
L3 VAr Ph-C reactive power
unit：KVAr
$1014
1
L2 Var Ph-B reactive power
unit：KVAr
$1015
1
L1 VAr Ph-A reactive power
unit：KVAr
$1016
1
Tacho Rotating speed of Speed sensor
unit：RPM
$1017
1
OilPress value of oil p-sensor
unit：Kpa
$1018
1
Coolant value of T-sensor
unit：℃
$1019
1
VBAT Battery voltage
unit：V
$101A
1
VALT Charge excitation voltage
unit：V
$101B
1
AI input voltage standby
unit：mV
bit0—oil pressure
bit1—water temperature
bit2—emergency stop
bit3—remote control start
$101C
1
Bit4—switch signal standby
bit0—diesel engine oil
bit1—diesel engine start
bit2—Gen.set run in normal
bit3—Alarm output
bit4—Pre-alarm output
$101D
1
bit5—Idle speed output
$101E
1
LED
$101F
1
Palarm Pre-alarm code