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Operating Instructions – Electronic Motor DRC.-..-DAC
9
Transmitting individual parameters via AS-Interface
Communication with AS-Interface Double Slave GLK31A
9.3
Transmitting individual parameters via AS-Interface
9.3.1
MOVILINK
®
parameter channel
The MOVILINK
®
parameter channel enables access to all drive parameters of the DRC
inverter regardless of the bus in use. It is also used for parameter access of the AS-
Interface master to the DRC inverter via the GLK31A AS-Interface slave. The following
figure shows the structure of the MOVILINK
®
parameter channel:
The request and response frames of the MOVILINK
®
parameter channel have the same
structure.
Addressing byte
The addressing byte specifies the MOVILINK
®
telegram destination, see also the
"Parameters" chapter:
• 0: Command PCB
• 1: Power section
Management byte
Management byte 1 coordinates the parameterization process. It provides important
service parameters of the executed service.
• Bits 0 – 3 specify the service to be executed.
• Bits 4 and 5 specify the data length of the write service.
• Handshake bit 6 is used as an acknowledgement bit for cyclic transmission. This bit
is not used for the parameter transmission with the GLK31A option.
• Status bit 7 indicates whether the service was carried out properly or whether errors
occurred.
Index addressing
Byte 2 / subindex, byte 3 / high index, and byte 4 / low index specify the parameter to be
read or written via the parameter channel. The parameters of the inverter are addressed
using the same index in all communication interfaces.
Data range
The data is located in bytes 5 – 8 of the MOVILINK
®
parameter channel. This means a
maximum of 4 bytes per service can be transmitted across the parameter channel. The
data is always right-justified. This means byte 8 contains the least significant data byte
(LSB data) whereas byte 5 is the most significant data byte (MSB data).
2440583307
Sub
index
Index
high
Index
low
MSB
data
Manage-
ment
Byte 1
Address-
ing
Byte 0
Byte 2
Data
Data
LSB
data
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
Byte 8
Management byte 1
Bit
Meaning
Value
0 – 3
Service executed
0000
bin
No service
0001
bin
Read parameter
0010
bin
Write parameter
0011
bin
Write parameter volatile
0110
bin
Read default
4 – 5
Length of data/error bytes
11
bin
4 bytes
6
Handshake bit
0: Not used for unit variants with GLK31A option
7
Status bit
0: No error while executing service
1: Error while executing service, see bytes 4 – 7
