User Manual

Run-up and switch-off of the 2-speed motor.
Control se
quence
"Switch-on de
lay", "Switch-off delay", min. switch-on time and min. switch-off time
are considered.
Functio
n diagram
0
0
TiOnMin1
TiCst TiRup
TiOffMin TiOnMin1
0
TiRup
TiOnMin2
TiOnMin1
Speed 2
Speed 1
Off
TiRup = Runup time
Key
T
iCst = Rundown time
DlyOn = Switch-on delay
DlyOff = Switch-off delay
TiOnMin1 = On time minimum, Step 1
TiOnMin2 = On time minimum, Step 2
TiOffMin = Off time minimum
Lockin
g 2
nd
speed by
outside temperature
Y
ou can lock the second speed if the temperature drops below an adjustable
outside temperature value.
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Motor > Motor 1...6 >
Settings
Operating lin
e Range Factory setting
Speed 2 locked (OT-dependent)
50... 250 °C, ---
---
Setting "---" disables this function. The 2
nd
speed is locked if the function is active
and if there is not outside temperature value during operation.
Note
s
8.4.4 Twin motor
Use the "Twin motor" to control e.g. a twin pump.
Purpos
e
In addition to default functi
ons, RMS705B offers special control functions to
optimally control a twin motor:
S
pecial control functions

Run priority changeover for motor faults, automatic or manual.
 Adjustable changeover period for orderly changeover of motors.
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Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Aggregates 01.04.2010