141 • HRVS-DN Communication (ModBus Protocol)
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byte 6: Data High
($00)
(Deceleration Time = 10Sec)
byte 7: Data Low
($10)
byte 8: Data High
($00)
(Final Torque = 0)
byte 9: Data Low
($00)
byte 10: CRC_Low
($XX)
byte 11: CRC_High
($XX)
Example 3 :
To write one setting parameter (Under_Voltage_Trip = 300V) to Parameter Setting # 16 (Addressed as 15) of
HRVS-DN # 5, the host computer should send following frame:
byte 1: Serial Link No.
($05)
byte
2:
Function
($06)
byte 3: Starting Address High
($00)
byte 4: Starting Address Low
($0F)
(15)
byte 5: Preset Data High
($01)
(300)
byte 6: Preset Data Low
($2C)
byte 7: CRC_Low
($XX)
byte 8: CRC_High
($XX)
The HRVS-DN normal response, is an echo of the query (Identical frame).
Example 4 :
To write multiple parameter settings (Undervoltage__Trip = 300V, Under_Voltage_delay = 10Sec,
Over_Voltage_Trip = 480V, Over_Voltage_delay = 2Sec) to Parameter settings # 16-19 (Addressed as 15-18)
of HRVS-DN # 128, the host computer sends the following frame:
byte 1: Serial Link No.
($80)
byte
2:
Function
($10)
byte 3: Starting Address High
($00)
byte 4: Starting Address Low
($0F)
byte 5: No. of Registers High
($00)
byte 6: No. of Registers Low
($04)
byte 7: Byte Count
($08)
byte 8: Data High
($01)
(300)
byte 9: Data Low
($2C)
byte 10: Data High
($00)
(10)
byte 11: Data Low
($10)
byte 12: Data High
($01)
(480)
byte 13: Data Low
($E0)
byte 14: Data High
($00)
(2)
byte 15: Data Low
($02)
byte 16: CRC_Low
($XX)
byte 17: CRC_High
($XX)
The HRVS-DN normal response:
byte 1: Serial Link No.
($80)
byte 2: Function
($10)
byte 3: Starting Address High
($00)
byte 4: Starting Address Low
($0F)
byte 5: No. of Registers High
($00)
byte 6: No. of Registers Low
($04)
byte 7: CRC_Low
($XX)
byte
8:
CRC_High
($XX)
Note:
A Normal response will be returned even if the preset data value is beyond the allowed range for one or more
parameter settings. Later the HRVS-DN program will check the value of each parameter. If it exceeds the
