NORD Drivesystems BU0230 - Manual (Page 50)

Functional safety with NORD SK 200E frequency inverters
50 BU 0230 GB-2712
List of the functions relevant to functional safety for the digital inputs P420[-01] ... [-04]
Value Function Description Signal
00 No function Input switched off. ---
10 1
Disable voltage The FI output voltage is switched off; the motor runs down freely. Low
11
1
Emergency stop The FI reduces the frequency according to the programmed fast
stop time P426.
Low
1
Also effective for bus control (RS232, RS485, CANbus, CANopen, DeviceNet, Profibus, InterBus, AS-Interface)
A complete list of all possible functions can be found in Manual BU 0200 GB.
Parameter
[factory setting]
Setting value / Description / Note Device Supervisor
Parameter
set
P426 Quick stop time S P
0 ... 320.00 sec
[ 0.10 ]
Setting of the stop time for the fast stop function which can be triggered either via a digital input,
the bus control, the keyboard or automatically in case of a fault.
Emergency stop time is the time for the linear frequency decrease from the set maximum
frequency (P105) to 0Hz. If an actual setpoint <100% is being used, the emergency stop time is
reduced correspondingly.
P428 Automatic starting S P
0 ... 1
[ 0 ]
In the standard setting (P428 =0  Off) the inverter requires a flank to enable (signal change
from "low high") at the relevant digital input.
In the setting On  1 the FI reacts to a High level. This function is only possible if the FI is
controlled using the digital inputs. (see P509=0/1)
In certain cases, the FI must start up directly when the mains are switched on. For this P428 = 1
 On can be set. If the enable signal is permanently switched on, or equipped with a cable
jumper, the FI starts up immediately.
NOTE: The "Automatic Start" function can only be used if a digital input of the frequency
inverter (DIN
1 … DIN 4) is parameterised to the function "Enable Right" or "Enable
Left" and this input is permanently set to "High". The digital inputs of the technology
units (e.g.:SK CU4 - IOE) do not support this "Automatic Start" function.
NOTE: The "Automatic Start" function can only be activated if the frequency inverter has
been parameterised to local control ((P509) setting { 0 } or { 1} ).
P434 [- 01]
[- 02]
Digital output function
0 ... 39
[ 7 ]
[-01] = Digital output 1, Digital output 1 of the frequency inverter
[-02] = Digital output 2, Digital output 2 of the frequency inverter (only SK 2x0E)
Control terminals 1/40
Various function can be assigned to the digital output: The following list shows the functions
relevant to functional safety and their logic. This behaviour can be inverted by a negative value
in P435.
A complete list of all functions can be found in Manual BU 0200 GB.