Trane BCHE - Page 98

98
BCX-SVX002A-EN
Table 33. Configuration settings of the motor control board (for reference only) (continued)
Description
on Unit Label
User Interface
Name
Typical User Interface
Value
Description
Mt1 Low PWM
Lt
MM11LLoo 1144.55
Sets the minimum maximum output
percentage that the controller will
request from Motor 1.
This envelope protection value should not be
altered.
Mt2 Hgh PWM
Lt
MM22hhii 9900
Sets the maximum output percentage
that the controller will request from
Motor 2.
This envelope protection value should not be
altered.
Mt2 Low PWM
Lt
MM22LLoo 1144.55
Sets the minimum maximum output
percentage that the controller will
request from Motor 2.
This envelope protection value should not be
altered.
Mt1 Ovspd RPM
rrppmm11 22550000
Selects the rpm above which the
Motor 1 will be assumed to be in an
overspeed condition and will need to be
shut down.
This envelope protection value should not be
altered.
Mt2 Ovspd RPM
rrppmm22 22550000
Selects the rpm above which the
Motor 2 will be assumed to be in an
overspeed condition and will need to be
shut down.
This envelope protection value should not be
altered.
Fan Proving Fct
FFPPrrvv FFnnsstt
Selects which mode should be assigned
to the Binary output circuit, depending
on unit type.
This setting has to be correct for proper unit
operation of electric heat and changeover units.
AI Boost Amp
AAiiSScc 11
Boosts or attenuates the analog input
signal to compensate for long wire runs.
A value of 11 should be used if no voltage level
compensation is needed (i.e., voltage peak is at
10 VDC).
AI Floor vvFFllrr 00.55
Rejects noise on the analog input lines
and sets up the motor control board to
turn on if the thermostat or controller is
commanding its analog outputs on.
PulsePerRev FFddbbkk 1188
Sets up the tachometer function to be
compatible with the on-board motor and
for correct speed calculation and
calibration.
Do not change this setting as this is critical to
proper unit operation.
P Value Mtr 1 ppvvll11 00.0033
Sets up the on board closed loop
control to control Motor 1 with proper
stability.
Do not change this setting.
I Value Mtr 1 IIvvll11 00.0033
Sets up the on board closed loop
control to control Motor 1 with proper
stability.
Do not change this setting.
P Value Mtr 2 ppvvll22 00.0033
Sets up the on board closed loop
control to control Motor 2 with proper
stability.
Do not change this setting.
I Value Mtr 2 IIvvll22 00.0033
Sets up the on board closed loop
control to control Motor 2 with proper
stability.
Do not change this setting.
Ht Sens Mk Val
F
AAii22mm 8855
Sets the make value for the motor
control board triac output based on the
thermistor input.
Operation also depends on FFpprrvv, AAii22BB, and
AAiippuu settings.
Ht Sens Bk Val
F
AAii22bb 9900
Sets the break value for the motor
control board triac output based on the
thermistor input.
Operation also depends on FFpprrvv, AAii22mm, and
AAiippuu settings.
Ht Sens
Resistor
AAiiPPuu oouutt
Sets the input impedance of the
thermistor input.
Should be pre-set to "OUT" for Tracer
®
ZN
controllers.
Mt 1 Ramp
%/sec
MM11rrpp 33
Sets the ramp rate for Motor 1, in % per
second.
Mt 2 Ramp
%/sec
mm22rrpp 33
Sets the ramp rate for Motor 2, in % per
second
ECM Overview and Setup