GE ASTAT XT QT 0008U Series User Manual page 93

5. Always wait more than 0.5 sec after using Functions 06 or 16 to preset parameter(s) before transmitting
again to the same ASTAT-XT.
6. Communication parameters 81...87 can only be read through the serial link. They can only be set (written)
manually.
7. It is the user's responsibility to read and check all changed parameter settings after presetting.
Example 2:
To Read Stop Parameter settings 41-43 addressed as 40-42 (Soft Stop Curve, Ramp Down Time and End Torque) of
ASTAT-XT # 96. The host computer sends the following frame:
byte 1: Serial Link No.
byte 2: Function
byte 3: Starting Address High ($00)
byte 4: Starting Address Low ($28)
byte 5: No. of Registers High
byte 6: No. of Registers Low
byte 7: CRC_Low
byte 8: CRC_High
The ASTAT-XT Normal response:
byte 1: Serial Link No.
byte 2: Function
byte 3: Byte Count
byte 4: Data High
byte 5: Data Low
byte 6: Data High
byte 7: Data Low
byte 8: Data High
byte 9: Data Low
byte 10: CRC_Low
byte 11: CRC_High
Example 3:
To write one parameter setting (Undervoltage FLT = 300V) to Parameter Setting # 10 (Addressed as 9) of ASTAT-XT #
5, the host computer sends the following frame:
byte 1: Serial Link No.
byte 2: Function
byte 3: Starting Address High ($00)
byte 4: Starting Address Low ($09)
byte 5: Preset Data High
byte 6: Preset Data Low
byte 7: CRC_Low
byte 8: CRC_High
The ASTAT-XT Normal response is an echo of the query:
byte 1: Serial Link No.
byte 2: Function
byte 3: Starting Address High ($00)
byte 4: Starting Address Low ($09)
byte 5: Preset Data High
byte 6: Preset Data Low
byte 7: CRC_Low
byte 8: CRC_High
Example 4:
To write multiple parameter settings (Undervoltage_FLT = 300V, Undervoltage_DLY = 10Sec, Overvoltage_FLT =
480V, Overvoltage DLY = 2Sec) to Parameter settings # 10-13(Addressed as 9-12) of ASTAT-XT # 128, the host
computer sends the following frame:
• Appendix A - MODBUS RTU Protocol
93
($60)
($03)
(40)
($00)
($03)
($XX)
($XX)
($60)
($03)
($08)
($00) (Soft Stop Curve = 0)
($00)
($00) (Ramp Down Time = 10Sec)
($10)
($00) (End Torque = 0)
($00)
($XX)
($XX)
($05)
($06)
(9)
($01) (300)
$2C)
($XX)
($XX)
($05)
($06)
($01)
($2C)
($XX)
($XX)