Manual – MOVIDRIVE® MDX60B/61B Communication and Fieldbus Unit Profile
79
7
Process data description
SEW Unit Profile
7.3
Process data description
The process data description defines the content of the process data to be transmitted.
The user can individually assign all the process data words.
The following 6 fieldbus parameters are available for defining the first three process data
words:
• P870 Setpoint description PO1
• P871 Setpoint description PO2
• P872 Setpoint description PO3
• P873 Actual value description PI1
• P874 Actual value description PI2
• P875 actual value description PI3
If one of the above mentioned parameters is changed, acceptance of process output
data for setpoint processing via fieldbus is automatically disabled. Only when the field-
bus parameter is activated again
• P876 PO data enable = ON
will the received process output data be processed according to the new actual and set-
point value descriptions.
Process data words 4 to 10 can only be read and written using IPOS
plus®
.
Setpoint descrip-
tion PO data
The parameters
setpoint description PAx
define the content of those process output
data words which the higher-level programmable controller sends via the fieldbus
system (see following figure).
You can use the process output data words PO1, PO2 and PO3 to transmit the men-
tioned setpoints across the process output data channel. You can decide yourself in
which process data word the more significant part (high) or the less significant part (low)
is transmitted.
55025AEN
PO 1
PO 2
Process output data
PO 3
Ctrl word 1
Ctrol word 2
Speed setpt.
Current setpt.
etc.
Ctrl. word 1
Ctrl. word 2
Speed setpt.
Current setpt.
etc.
Ctrl. word 1
Speed setpt.
Current setpt.
etc.
P872: SETPT. DESCR. PO3
P871: SETPT. DESCR. PO2
P870: SETPT.DESCR. PO1
Ctrl. word 2
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