SEW-Eurodrive MOVIGEAR DAC B, Operating Instructions Manual

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Operating Instructions – MOVIGEAR® DAC-B
9
Transmitting individual parameters via AS-Interface
Communication with AS-Interface Double Slave GLK31A
"Read request" Once the CTT2 service "Write request" has been executed correctly, you can use the
service 0x10
hex
"Read request" to call the response telegram of the CTT2 service
previously executed.
Select index 0x02
hex
and length 0x09
hex
.
• If this service is properly transmitted to the double slave, the GLK31A double slave
replies with the response telegram 0x50
hex
"Read response OK" and the data.
• If errors occur, the GLK31A double slave sends the response telegram 0x90
hex
"Read response not OK" (for error codes, refer to the AS-Interface specification).
• If the response data of the MOVIGEAR
®
inverter are not available yet, the GLK31A
double slave sends a response with error code "Busy" = "4" after the read access.
The AS-Interface master must read the data again.
Example:
Requesting the correct response of the MOVIGEAR
®
inverter from the previous change
of the fixed setpoint value n4 ( 10096.38 )
"Read request" service:
The slave replies after the system-related telegram runtime.
"Read response OK" response telegram:
CTT2 service
Code Index Length
0x10 0x02 0x09
Code 0x10 = Read request
Index 0x02 = MOVILINK
®
parameter service
Length 0X09 = Length of the MOVILINK
®
protocol
CTT2 service MOVILINK
®
protocol
Code Addres
sing
Man-
age-
ment
Sub-
index
Index
high
Index
low
MSB
data
Data Data LSB
data
0x50 0x00 0x32 0x26 0x27 0x70 0x00 0x00 0x00 0x00
Code 0x50 = Read response OK
Management 0x32 = Write parameter => no MOVILINK
®
error
Addressing 0x00 = Addressing the command pcb because this is where the parameter is stored.
Subindex 0x26 = Subindex of parameter fixed setpoint n4 (10096.38) 38
dec
= 0x26
Index High 0x27 = High value of the index
Index Low 0x70 = Low value of the index
=> Index of the parameter = 10096
dec
= 0x2770
hex
The value 0x2770
hex
is written on the index high and index low bytes.
Data MSB 0x00 If the MOVILINK
®
service has been executed correctly, the data byte value is
0x0 = 0
dec
Data 0x00
Data 0x00
Data LSB 0x00