Siemens LME7 Series Technical Instructions

LME Series
Technical Instructions
LME-1000
PW Level Default Range Description
LEGEND - Password Level: S = Service; O = OEM; S/O = View - Service, Write - OEM; Info = Info Menu; Ser = Service Menu
Shaded Parameters = Frequently Used
Parameter Name
Parameter
Number
PME71.
111A1
PME71.
112A1
PME71.
901A1
658.01
Minimum PWM
Signal
0% 0-20% Sets a minimum PWM signal that the LME7 will transmit to the PWM blower.
•
658.02 Maximum PWM Signal 100% 80-100% Sets a maximum PWM signal that the LME7 will transmit to the PWM blower.
•
659.00 Min Ramp Up For Siemens use only. Sets the minimum allowable value for the ramp up time (parameter 522).
•
659.01 Max Ramp Up For Siemens use only. Sets the maximum allowable value for the ramp up time (parameter 522).
•
659.02 Min Ramp Down For Siemens use only. Sets the minimum allowable value for the ramp down time (parameter 523).
•
659.03 Max Ramp Down For Siemens use only. Sets the maximum allowable value for the ramp down time (parameter 523).
•
660 Tolerance Band 1 Time
For Siemens use only. Sets the amount of time the blower speed can lie outside of tolerance band 1
before a lockout occurs.
•
674
Minimum Speed
Change
40 RPM 0-255 RPM
Only requested speed changes larger than the value of this setting will actually be corrected. This serves
as a dead band to protect the PWM blower from constant small speed oscillations.
•
675.00
Minimum PWM
Signal Prepurge
86% 0-100%
Sets the minimum allowable PWM signal that the LME7 will transmit to the PWM blower during prepurge.
This should be set so that as long as the blower speed remains at or above this setting, a successful
prepurge will occur regardless of all other conditions (air temperature, air pressure, undervoltage to
blower, etc.)
•
675.01
Maximum PWM Signal
Ignition
34% 0-100%
Sets the maximum allowable PWM signal that the LME7 will transmit to the PWM blower during ignition.
This should be set so that as long as the blower speed remains at or below this setting, a successful lightoff
will occur regardless of all other conditions (air temperature, air pressure, overvoltage to blower, etc.)
•
676 Proportional Band 112 0-255
P-part of the PID loop controlling the blower speed when closed-loop speed control is used. P is the
proportional band. Smaller values give a more aggressive response. It is recommended to leave this
setting at the default value.
•
677 Integral Time 0.441 sec 0-37.485 sec
I-part of the PID loop controlling the blower speed when closed-loop speed control is used. I is the integral
(reset) function. This component serves to eliminate steady-state error by looking at the accumuation of
error over a period of time and correcting for it. Smaller values give a more aggressive response. It is
recommended to leave this setting at the default value.
•
678 Derivative Time 0 sec 0-37.485 sec
D-part of the PID loop controlling the blower speed when closed-loop speed control is used. D is the
derivative function. This component serves to eliminate overshoot caused by the integral value, and also
dampen the action of the P and I values. Smaller values give a weaker response. It is recommended to
leave this setting at the default value.
•
679.00
Lower Range Time
Constant
6.027 sec 0-37.485 sec
Sets the time constant for speed control in the lower speed range when ramping down. It is
recommended to leave this setting at the default value.
•
679.01
Medium Range Time
Constant
6.027 sec 0-37.485 sec
Sets the time constant for speed control in the medium speed range when ramping down. It is
recommended to leave this setting at the default value.
•
679.02
Upper Range Time
Constant
6.027 sec 0-37.485 sec
Sets the time constant for speed control in the upper speed range when ramping down. It is
recommended to leave this setting at the default value.
•
679.03
Total Range Time
Constant
6.027 sec 0-37.485 sec
Sets the time constant for speed control in all speed ranges when ramping up. It is recommended to leave
this setting at the default value.
•
680.00
Upper Speed Range
Threshold
4000 RPM 800-9000 RPM
Sets the speed threshold between the upper and medium speed ranges for parameters 679.01 and 679.02.
•
680.01
Lower Speed Range
Threshold
2000 RPM 800-9000 RPM Sets the speed threshold between the lower and medium speed ranges for parameters 679.00 and 679.01.
•
S/O
Read onlyS
S/O
SCC Inc. Page 9 Section 2

Siemens LME7 Series Specifications

General

Brand	Siemens
Model	LME7 Series
Category	Controller
Language	English