SEW-Eurodrive MOVIGEAR DAC B, Operating Instructions Manual

Page: 157 / 258

Operating Instructions – MOVIGEAR® DAC-B
157
9
Transmitting individual parameters via AS-Interface
Communication with AS-Interface Double Slave GLK31A
MOVILINK
®
parameter
exchange with
"Exchange
request"
Executing the CTT2 service "Exchange request" 0x1D, the AS-Interface master sends
a telegram with the MOVIGEAR
®
parameter data to the double slave and receives the
response data immediately with the response telegram.
Select index 0x02
hex
and length 0x09
hex
.
• If this service has been executed correctly, the GLK31A double slave sends the
response telegram 0x5D
hex
"Exchange response OK" and the read data.
• If errors occur, the GLK31A double slave sends the response telegram 0x9D
hex
"Exchange response not OK" (for the error code, 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.
Example:
Changing the fixed setpoint value n4 (parameter 10096.38 ) to 1000 rpm:
"Exchange request" service:
CTT2 service MOVILINK
®
protocol
Code Index Read
length
Write
length
Addre
ssing
Man-
age-
ment
Sub-
index
Index
high
Index
low
MSB
data
Data Data LSB
data
0x1D 0x02 0x09 0x09 0x00 0x32 0x26 0x27 0x70 0x00 0x0F 0x42 0x40
Code 0x1D = Exchange request
Index 0x02 = MOVILINK
®
parameter service
Read length 0x09 = Length of the MOVILINK
®
response
Write length 0x09 = Length of the MOVILINK
®
request
Addressing 0x00 = Addressing the command pcb because this is where the parameter is stored.
Management 0x32 = Write parameter
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 The internal scaling of the MOVIGEAR
®
inverter is 1000 times higher than the
real scaling.
The scaling factor then is 1 000 000
dec
= 0xF4240.
This value is written to the 4 data bytes.
Data 0x0F
Data 0x42
Data LSB 0x40