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5.3 PZD-part
In this chapter the process data part (PZD) of a PPO is discussed.
The PZD part consists of a fixed part (PZD1-2, all PPO's) and a parameterable part (PZD 3-10, shaded grey
above, PPO 2, 4 and 5).
In the fixed part, control word and speed reference are transferred to the inverter while status word and actual
output frequency are transferred from the inverter.
In the parameterable part, PZD word 3-10, the user can configure what parameters that should be transferred
to/from the inverter every bus-cycle (see chapter 5.3.3 and Appendix).
5.3.1 Control- / status word (STW/ZSW)
This section describes how to operate the inverter with the control-/status word. With the control word the
Profidrive state-machine (Figure 5-2) is controlled, the status word is reflecting the state of the inverter.
Profidrive Control Word (STW):
The control word is used to send control commands to the inverter (PLC->Inverter).
Bit
Value
0
1
On1
0
OFF1
1
1
ON2
0
OFF2
2
1
ON3
0
OFF 3
3
1
Operation enabled
0
Operation disabled
4
1
Condition for operation
0
Ramp generator disabled
5
1
Ramp generator enabled
0
Stop ramp generator
6
1
Enable set-point
0
Inhibit set-point
7
1
Acknowledge
0
No function
8
1
Inching 1 ON
0
Inching 1 OFF
9
Not used
10
1
Data valid
0
Data invalid
11
1
REV
0
FWD
12
1
Commands invalid
0
Commands valid
13
1
Reference invalid
0
Reference valid
14,
Not used
15
Meaning
Inverter can be started if all other start conditions are fulfilled.
Normal stop; uses deceleration time specified in "1
Inverter can be started if all other start conditions are fulfilled.
Inverter coast to stop. Returns to Switch-on inhibit state.
Inverter can be started if all other start conditions are fulfilled.
Quick stop that uses deceleration time specified in "2
(F203).
Inverter can be started if all other start conditions are fulfilled.
Inverter coast to stop (Enter Inhibit operation state).
Inverter can be started if all other start conditions are fulfilled.
Output frequency is set to zero. Inverter remains in the running state.
Inverter can be started if all other start conditions are fulfilled.
Actual output frequency is frozen. A change to frequency set-point has no
effect.
Inverter can be started if all other start conditions are fulfilled,
using "1
Normal stop that uses deceleration time specified in "1
Fault is acknowledged on positive edge, i.e. bit 7=0 then 1
(Enter Switch-on inhibited state).
Inverter accelerates to inching set-point 1.
Profidrive must be in "Enable operation" state.
Parameter "Jogging frequency" specifies the jogging set-point (A038).
Inverter brakes as fast as possible and goes into the "Enable operation" state.
The control word and frequency set-point (from Profibus) are activated.
Please refer to chapter 2.2.4.
The control word and frequency set-point (from Profibus) are not valid.
Please refer to chapter 2.2.4.
Inverter will operate in reverse motion.
Please note that a negative reference and reverse selected will result in inverter
running forward.
Inverter will operate in forward motion.
The fieldbus module will not write any commands to the inverter. This makes it
possible to operate motor via the terminal input (if A002 is set to "Terminal").
The fieldbus module can write commands to the inverter (if A002 is set to
"Terminal").
The fieldbus module will not write any reference to the inverter.
The fieldbus module can write reference to the inverter (if A001 is set to
"Operator").
Control word
st
Acceleration time" (F002).
13
CHAPTER5 OPERATING
Remark
st
Deceleration time" (F003).
nd
deceleration time"
st
deceleration time".
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