GE Industrial Solutions ASTAT BP User Manual
Page 90
ASTAT BP User Manual
90
GE Industrial Solutions
©2013 GE Company All Rights Reserved
Example 6 - Read Coils:
To read coils 1..8 status of ASTAT-BP # 10, the host computer sends the following Query frame:
byte 1: Serial Link No.
($0A)
byte 2: Function
($01)
byte 3: Starting Address High
($00)
byte 4: Starting Address Low
($00)
byte 5: No. of Coils High
($00)
byte 6: No. of Coils Low
($08)
byte 7: CRC_Low
($XX)
byte 8: CRC_High
($XX)
The ASTAT-BP response when coils 7..0 are OFF OFF OFF ON OFF ON OFF OFF:
byte 1: Serial Link No.
($0A)
byte 2: Function
($01)
byte 3: Byte Count
($01)
byte 4: Data (coils 7..0)
($14)
byte 5: CRC_Low
($XX)
byte 6: CRC_High
($XX)
Example 7 - Force Single Coil:
To stop the motor controlled by ASTAT-BP # 1, the host computer writes "1" to the
"STOP COIL" (coil 1 addressed as 0) .
Note: For the Force Single Coil Function, Force Data of $0000 forces "0" = OFF.
Force data of $FF00 forces "1" = ON. The "Query" frame is sent by the host:
byte 1: Serial Link No.
($01)
byte 2: Function
($05)
byte 3: Coil Address High
($00)
byte 4: Coils address Low
($00)
byte 5: Force Data High
($FF)
(force ON)
byte 6: Force Data Low
($00)
byte 7: CRC_Low
($XX)
byte 8: CRC_High
($XX)
The Normal (if no exception) response:
byte 1: Serial Link No.
($01)
byte 2: Function
($05)
byte 3: Coil Address High
($00)
byte 4: Coils address Low
($01)
byte 5: Force Data High
($FF)
byte 6: Force Data Low
($00)
byte 7: CRC_Low
($XX)
byte 8: CRC_High
($XX)
Notes:
1.
Format is identical for the 3 "discrete" commands: Stop, S.Stop, Start & Reset. For these commands,
writing "OFF" to coil is meaningless. For example, when the ASTAT-BP is in the Stop condition, Coil #1
(Addressed as 0) = 1 (ON). Forcing the Stop Coil #1 to OFF does nothing. However, forcing the Start Coil
(#3) to ON will turn ON the Start Coil, but will also turn Off the Stop Coil.
2.
For Energy Save, Dual Adjust, Slow Speed & Slow Speed Reverse Coils, writing "ON" will turn the option
ON, while writing "OFF" will turn it OFF .