Configuration Help For Generator Operation And Emergency; Retraction; Special Case Voltage Failure - Siemens SINUMERIK 840C Installation Instructions Manual

09.95
12.20.8

Configuration help for generator operation and emergency

retraction

12.20.8.1

Special case voltage failure

Requirements
The generator operation and emergency retraction functions on SINUMERIK 840C require the
following hardware and software:
• Hardware components:
- SINUMERIK 840C standard hardware
- SIMODRIVE 611D standard hardware with modified drive control loops of the type
6SN1 118-0DG... or 6SN1 118-0DH...
- Controlled infeed/regenerative feedback module (16 kW upwards) with suitable pulse
resistance module and possibly additional capacitors for the DC link.
- Capacitor module (accessory 6FX2 006-1AA00: available as of the beginning of 1995)
to back up the power supply 115-230 V AC for the central unit and operator panel or
alternatively the 24 V DC power supply (available as of the 1st quarter of 1995) and
possibly 24 V DC operator panel (available as of 2nd quarter 1995).
• Software components
- System software SW 4.2
- Generator operation option
- Emergency retraction option (includes regenerative operation)
The following points must be noted for configuration:
1. The electronics of the drive controls must be powered from the DC link. With the
infeed/regenerative feedback modules, the connection with the DC link must be made (see
Start-up Guide 611).
2. NC and the operator panel must be backed up by suitable means, e.g.: capacitor module
for 230 V power supply or accumulator for 24 V power supply.
3. The supply to the PLC peripherals must be backed up by the accumulator.
DC link backup/total energy:
The energy available in the DC link of the drive units is calculated as follows in case of power
failure:
Zk 2
E = 1/2 * C * (U
where
E = Energy in watt seconds [Ws]
C = Total capacity of the DC link in farads [F]
U = Content of the drive machine data 1634
Zk
U = Lower limit for safe operation taking the motor-specific emf into account, but
min
always above the switch-off threshold of 280 V
© Siemens AG 1992 All Rights Reserved
SINUMERIK 840C (IA)
12.20.8 Configuration help for generator operation and emergency retraction
min 2
- U )
6FC5197- AA50
12 Functional Descriptions
12–227