Program An Output Contact For Motor Starting; Access2 Control Equation Setting - Siemens SIMPRO-100 Instruction Manual

B
Control Equations & Relay Logic
The START Relay Word bit remains asserted for
0.5 seconds, unless the relay trips. If the relay
trips before the 0.5 second timer expires, the
relay resets the timer, clearing the START Relay
Word bit.
The Motor Start control equation allows you to
define a logical condition that initiates a motor
start.
Example: Initiating a Motor Start Using a
Relay Contact Input
You can use a relay contact input such as
IN6 to initiate motor starting. Set the control
equation STR = IN6. Connect the normally
open pushbutton contact to relay terminals
C08 and C09 (IN6). Program an output
contact to close when the START Relay
Word bit asserts, as shown in
Section B.11.1, page 150. When you push
the button, IN6 is asserted, asserting the
START bit, closing the output contact, and
initiating the start.
In an emergency, it may be necessary to quickly
start the motor even though a protection lockout
condition exists and is holding the TRIP output
contact asserted. The lockout might be a result of
the thermal element or another protection
function (see Section B.9, page 147). You can
override all the lockout conditions using the
Emergency Restart function.
The relay asserts the Emergency Restart Relay
Word bit (EMRSTR) in response to any of these
conditions:
• The EMRSTR Control Equation result is true
(logical 1)
• You execute the front-panel menu Emergency
Restart command
• The relay receives a Modbus Emergency
Restart control command
150
When the Emergency Restart Relay Word bit
asserts, the relay:
• Resets the motor thermal element capacity
used to 0%
• Manipulates the Starts-Per-Hour, Minimum
Time Between Starts, and Antibackspin
functions to permit an immediate start
• Deasserts the TRIP output contact if no fault
detecting element is picked up
• Initiates a motor start through the logic shown
in Figure B.8, page 149
Note: For the EMRSTR control equation
performance to match the
performance of the front-panel and
Modbus Emergency Restart functions,
you should include * STOPPED in the
control equation, as shown in
Section B.5, page 144. Do not set
EMRSTR = 1.
B.11.1 Program an Output
Contact for Motor Starting
In the factory settings, the result of the start logic
in Figure B.8, page 149 is routed to output
contact OUT3 with the following control equation:
OUT3 = START
B.12 ACCESS2 Control
Equation Setting
The ACCESS2 control equation settings define
conditions when Level 2 command access is
permitted without Level 2 password entry. The
factory default setting allows Access Level 2
serial port and front-panel command execution
when input IN4 is asserted. You may want to
connect a keyswitch contact to the input so relay
settings can be modified by persons having the
correct key.
SIMPRO-100
Equation B.5
PRIM-2400C