Danfoss VLT Series Programming Manual page 92

Servo Access Box (SAB) Oper...
The functionalities of the SAB include:
•
Distributes and switches the U
•
Rectifies the 400 V AC 3-phase mains input and switches the resulting DC bus voltage.
•
Distributes the fieldbus to the hybrid cable outputs and routes it to a 2
cabling.
3 3
•
Connects the STO (Safe Torque Off) voltages to the hybrid cables.
•
Provides a master guide value for the whole system.
•
When required, assigns the Ethernet POWERLINK
•
Controls the 2 relays.
•
Dissipates the recuperation energy using an external brake resistor.
3.2 Control
To change the state of the SAB, write to the Controlword
(see chapter 8.1 Object 0x4040: Controlword). This can be
done in 2 ways:
•
Using the PLC via the fieldbus.
•
Via a connected LCP in local control mode.
The actual state can be read back from the Statusword (see
chapter 8.2 Object 0x4041: Statusword). After power-up, the
U output is activated by default and communication
AUX
with the connected servo drives is possible.
UDC cannot be activated unless U
vating U always also deactivates UDC.
AUX
Illustration 3.2 shows the possible transitions.
U is applied AND
AUX
Init Without U
AUX
Disable UDC
Disable UDC
Illustration 3.2 State Diagram with Possible Transitions
Legend:
90
voltage (24–48 V) that powers the control logic of the servo drives.
AUX
is enabled. Deacti-
AUX
Initial
Reset (Clear Errors )
Error
Init
Init without U Init with U
AUX
AUX
Error
U Disabled
AUX
Enable U
Disable U
AUX
AUX
Standby
Error
Switch On
Error
Power up
Inrush SAB card nished
Operation
Enabled
Error
Danfoss A/S © 01/2017 All rights reserved.
®
VLT Integrated Servo Drive ISD
®
IDs to the connected servo drives.
Transitions with dashed lines: Commands (Reset, Errors,
U control, UDC control).
AUX
Transitions with solid lines: Automatic transitions with
specified conditions.
States shaded dark gray: The control can be changed
between remote and local via the LCP.
The defined states and the possible transitions, along with
the executed actions, are defined in Table 3.1. The actual
encoding is shown in chapter 8.2 Object 0x4041: Statusword.
Current
state
Init
U
AUX
disabled
Standby
Fault
Power-up
Operation
enabled
®
510 System
nd
RJ45-connector for simple cabinet
Transition Required Executed
command condition action
(Auto) Initialization –
finished
Error – –
U enable U applied Enable
AUX AUX
U
AUX
Error – –
U disable – Disable
AUX
U
AUX
UDC enable U 1 & 2 –
AUX
ready
Error – –
(Auto) Inrush –
finished
U disable – Disable
AUX
U
AUX
Disable
UDC
UDC disable – Disable
UDC
Error – Disable
UDC
U disable – Disable
AUX
U
AUX
Disable
UDC
UDC disable – Disable
UDC
Error – Disable
UDC
Following
state
Standby
Fault
Standby
Fault
Standby
Power-up
Fault
Operation
enabled
U
AUX
disabled
Standby
Fault
U
AUX
disabled
Standby
Fault
MG36D102