Operating Instructions – Electronic Motor DRC.-..-DAC
161
9
Transmitting individual parameters via AS-Interface
Communication with AS-Interface Double Slave GLK31A
MOVILINK
®
parameter
exchange with
"Write request"
and "Read
request"
For the MOVILINK
®
parameter exchange, you can also use the "Write request" and
"Read request" service instead of the recommended "Exchange request".
"Write request"
Execute the CTT2 service 0x11
hex
"Write request" to read and write a DRC parameter.
Select index 0x02
hex
.
Select length 0x09
hex
. This is the length of a MOVILINK
®
frame in bytes.
• If this service is transmitted to the double slave correctly, the GLK31A double slave
replies with the response telegram 0x51
hex
"Read response OK".
• If an error occurs or if an incorrect index or length have been selected, the GLK31A
double slave sends the response telegram 0x91
hex
"Write response not OK" instead
(for the error code, refer to the AS-Interface specification).
Example:
Changing the fixed setpoint value n4 (parameter
10096.38
) to 1000 rpm:
"Write request" service:
The slave replies after the system-related transmission times for parameters.
"Write response OK" response telegram:
CTT2 service
MOVILINK
®
protocol
Code Index Length Address-
ing
Manage-
ment
Sub-
index
High
index
Low
index
MSB
data
Data
Data
LSB
data
0x11
0x02
0x09
0x00
0x32
0x26
0x27
0x70
0x00
0x0F
0x42
0x40
Code 0x11 =
Write request
Index 0x02 =
MOVILINK
®
parameter service
Length 0x09 =
Length of the MOVILINK
®
protocol
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
High index 0x27 =
High value of the index
Low index 0x70 =
Low value of the index
=> Index of the parameter = 10096
dec
= 0x2770
hex
The value 0x2770
hex
is written on the high index and low index bytes.
Data MSB 0x00
The internal scaling of the DRC inverter is 1000 times higher than the real scal-
ing.
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
CTT2 service
Code
0x51
Code 0x51 =
Write response OK
