Parker 590+ series, Руководство по эксплуатации продукта

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Installing the Drive
3-23
DC590+ Series DC Digital Drive
Control Connections continued
Current Limit A6
B3
Connect
terminal A6 to
B3. This connection provides control of the Positive and Negative Current Clamps and hence the Current Demand via
terminal A6 (ANIN5). The "ANIN 5 (A6)" function block contains parameters to set up maximum/minimum values
for the analog input, and a scaling ratio.
Adjust the main current limit using the MAIN CURR. LIMIT parameter [Tag No. 15]. Refer to Appendix D:
"Programming" - CURRENT LOOP.
Fixed Current Limit
For normal operation of the main current limit, connect Terminal A6 (ANIN5) to
Terminal B3 (+10V reference) and set the CURR.LIMIT/SCALER parameter to 200%.
This allows the MAIN CURR.LIMIT parameter to adjust the current limit between 0 and
200% full load current.
Variable Current Limit
If external control of the current demand is required, an additional 10K potentiometer
connected between Terminal B3 (+10V Ref) and Terminal B1(0V), with the wiper
connected to Terminal A6 (Analog I/P5) gives 0 to 200% of full load current provided
that the MAIN CURR. LIMIT and CUR. LIMIT/SCALER parameters are set to 200%.
Program Stop/Coast Stop B8
B9
C9
Connect
terminals B8
& B9 to C9 via
an Emergency
Stop relay.
These connections provide a Program Stop (B8), and a Coast Stop (B9).
Refer to Chapter 4: "Operating the Drive" - Starting and Stopping Methods.
The "Emergency Stop" relay (normally-open, delay on de-energisation) should not be part of the normal sequencing
system which is implemented via the Start contacts, but is a relay which can be operated in exceptional
circumstances where human safety is of paramount importance.
•
Removing 24V from B9 opens the main contactor via the relay
•
Removing 24V from B8 provides regenerative braking for 4 Quadrant DC590+ drives
A regenerative drive can be stopped using a Normal Stop , a Program Stop, or an Emergency Stop. However, a
non-regenerative drive can only be made to stop faster than friction and loading will allow by Dynamic
Braking.
Current
Limit
Controls
the
available
motor
torque
B3
B1
A6
+10V
0V
Current
Limit
B3
A6
+10V
Current
Limit
E'
Stop
PROG
STOP
COAST
STOP
B8 B9 C9
Relay