SIMOVERT P 6SE21 Series Inverters
English
Operating Instructions
Siemens plc 1995
G85139–A1615–U156–A
02.95
26
Parameter
Number
Description
Display
Setting
(Default)
Notes
P20
•
Serial interface selection
000
001
002
003
(000)
Local operation – monitoring only via serial interface.
Remote operation. Local controls disabled except for P20, which can be
selected and adjusted. If P20 is changed while the inverter is operating
then it will stop.
Note:
The trip input remains active if P05 = 004, 005, 006 or 007.
USS Protocol (monitoring only)
USS Protocol (monitoring and control)
P21
Serial interface address
000 –
030
(000)
Sets the address of the inverter when the serial interface is used.
P22
Serial interface parity & baud rate
000
001
002
003
004
005
006
007
008
(000)
Sets the parity and baud rate of the serial address:
USS Only
Parity
Baud Rate
(Even Parity)
Even
2400
9600
Even
4800
9600
Even
9600
9600
Odd
2400
9600
Odd
4800
2400
Odd
9600
4800
Ignored
2400
9600
Ignored
4800
9600
Ignored
9600
9600
Note:
The master unit must still transmit a parity bit in each byte.
P23
Digital input response speed
000
001
(000)
15 ms debounce of digital inputs (for relays or switches).
No debounce – suitable for transistor–controlled inputs in control
systems which require a fast response.
P24
Fixed frequency mode selection
000
001
002
(000)
Normal operation – fixed frequency disabled.
Selects fixed frequencies. In this mode the inverter only outputs fixed
frequencies, ramping between the fixed frequencies at rates set by P02
and P03. The fixed frequencies are selected using
∧
and
∨
(terminals
X11.17 and X11.18) in accordance with the following table:
Allows three fixed frequencies (P26, P27 & P28) and one analogue
setpoint in accordance with the following table:
Note:
002 is only valid if P04 is set to 000, 001, 002, 007, 008 or
009.
Freq
1
Freq
2
Freq
3
Freq
4
(1 = 7 – 33 V)
(0 = < 7 V)
0
0
1
0
0
1
1
1
Analogue
Freq
Freq
2
Freq
3
Freq
4
0
0
0
1
1
0
1
1
