Baumuller b maXX 1000 - PTC Resistor Curve

Parameter
Parameter manual b maXX
®
1000
Document no. 5.07004.03
33
of 208
4
Refer to following calculation for protection level and warning level.
1 Protection level (error level)
ZP0119– = V
+10
* (R
PTC1
//47k) / [R1 + (R
PTC1
//47k)]l
2 Warning level
ZP0120– = V
+10
* (R
PTC2
//47k) / [R1 + (R
PTC2
//47k)]
3 Definition:
V
+10
: voltage between +10V-ACM, range 10.4 to 11.2 V
DC
R
PTC1
: motor PTC overheat protection level.
Corresponding voltage level set in ZP0119–
R
PTC2
: motor PTC overheat warning level.
Corresponding voltage level set in ZP0120–
47k: is AVI input impedance
R1: resistor-divider (recommended value: 1 to 20 kΩ)
Take the standard PTC resistor as example:
If protection level is 1330Ω, the voltage between +10V-ACM is 10.5V and resistor-divider
R1 is 4.4kΩ. Refer to following calculation for ZP0119– setting.
1330//47000 = (1330*47000)/(1330+47000) = 1293.4
10.5*1293.4/(4400+1293.4)=2.38(V)
≈ 2.4 (V)
Therefore, ZP0119– should be set to 2.4.
Figure 10: PTC resistor curve
P0120
Warning level PTC overheat, refer to ZP0119–.
P0121
Reset level PTC overheat, refer to ZP0119–.
P0120
Motor Kaltleiter Überhitzung Warnungsgrenze 0.1 to 10.0 V
EE Motor PTC overheat warning level 1.2 V
ON BM_u_PTCOverheatWarningLevel 10:1 -
P0121
Motor Kaltleiter Überhitzung 0.1 to 5.0 V
EE Motor PTC overheat reset delta level 0.6 V
ON BM_u_PTCOverheatResetLevel 10:1 -