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System Manual – MOVIDRIVE® compact Drive Inverters
10
Starting up the inverter with INTERBUS (MCH42A)
Startup
Object "MOVILINK
cyclic parameter
channel"
The "MOVILINK
®
acyclic parameter channel" object is 8 bytes long and contains the
MOVILINK
®
parameter channel. This object can be used for acyclical parameter
access, i.e. the inverter executes the processing of the service coded in the parameter
channel every time it receives a WRITE service to this object. The handshake bit is not
evaluated. The following table shows the structure of the "MOVILINK
®
acyclic
parameter channel". Refer to the "MOVIDRIVE
®
Fieldbus Unit Profile and Parameter
List" documentation for information on the structure of the parameter channel.
Two different operations are involved when setting the inverter parameters via the
acyclic MOVILINK
®
parameter channel:
•
Parameter channel performs a write service
•
Parameter channel performs a read service
Parameter chan-
nel performs a
write service
If a write type service is executed via the acyclic parameter channel (e.g. write
parameter or write parameter volatile), the inverter responds with the current service
confirmation after the service has been executed. An incorrect write access returns the
corresponding error code.
This option offers the advantage that the write service can be processed upon sending
a single WRITE "MOVILINK
®
parameter channel" and the service confirmation can be
accomplished by evaluating the "
®
Write Confirmation."
®
The following table shows the
execution of write services via the acyclic
®
MOVILINK
®
parameter channel.
The WRITE service coded in the parameter channel is executed and the service
confirmation is returned immediately as response.
Octet
0
1
2
3
4
5
6
7
Meaning
Management
Reserved
Index
high
Index
low
MSB
data
Data
Data
LSB
data
Note
Management
Reserved
Parameter index
4-byte data
Controller (master)
MOVIDRIVE
®
(slave)
1. Initiate the service coded in the parameter channel by means of a WRITE to the "MOVILINK
®
parameter
channel cyclical" object.
WRITE 8298 (parameter channel)
Service confirmation (OK/fault code)
0
0
I
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