166
Operating Instructions – Electronic Motor DRC.-..-DAC
9
Transmitting individual parameters via AS-Interface
Communication with AS-Interface Double Slave GLK31A
Setting the fixed
setpoint n0
Set the fixed setpoint n0 (parameter
8489.0
) to 1000 rpm.
"Exchange request" service:
When the GLK31A double slave receives the service "Exchange request" 0x1D, it sends
the MOVILINK
®
protocol to the DRC inverter. Once the DRC inverter receives the
MOVILINK
®
response, the GLK31A double slave sends the response "Exchange
response OK" to the AS-Interface master. This means another "Read request" service
of the AS-Interface master is not required.
The slave replies after the system-related transmission times for parameters.
"Exchange response OK" response telegram:
CTT2 service
MOVILINK
®
protocol
Code
Index
Read
length
Write
length
Address
-ing
Manage-
ment
Sub-
index
High
index
Low
index
MSB
data
Data Data LSB
data
0x1D
0x02
0x09
0x09
0x00
0x32
0x00
0x21
0x29
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 0x00 =
Subindex of the parameter
High index 0x21 =
High value of the index
Low index 0x29 =
Low value of the index
=> Index of parameter = 8489
dec
= 0x2129
hex
The value 0x2129
hex
is written to bytes high index and low index.
Data MSB 0x00
The internal scaling of the DRC 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
CTT2 service
MOVILINK
®
protocol
Code
Address-
ing
Manage-
ment
Sub-
index
High
index
Low
index
MSB
data
Data
Data
LSB
data
0x5D
0x00
0x32
0x00
0x21
0x29
0x00
0x00
0x00
0x00
Code 0x5D =
Exchange request OK
Addressing 0x00 =
Addressing the command PCB because this is where the parameter is stored
Management 0x32 =
Write parameter
Subindex 0x00 =
Subindex of the parameter
High index 0x21 =
High value of the index
Low index 0x29 =
Low value of the index
=> Index of parameter = 8489
dec
= 0x2129
hex
The value 0x2129
hex
is written to bytes high index and low index.
Data MSB 0x00
If the MOVILINK
®
service has been executed correctly, the data value is 0
dec
=
0x0
Data 0x00
Data 0x00
Data LSB 0x00