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Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide 363
Issue Number: 1
Percentage Of Drive Thermal Trip Level (J79) gives the percentage of the thermal trip level of the temperature monitoring point or thermal model in
the drive that is highest. This includes all thermal monitoring points (not just those selected by Monitored Temperature 1 (J71), Monitored
Temperature 2 (J72) and Monitored Temperature 3 (J73)), Inverter Temperature (J77) and Percentage Of DC Link Thermal Trip Level (J78).
Percentage Of DC Link Thermal Trip Level (J78) is used directly to give Percentage Of Drive Thermal Trip Level (J79), but for all other monitored
values which are temperatures this is given by Percentage of thermal trip level = (Temperature - 40
o
C) / (Trip temperature - 40
o
C) x 100 %
The location of the measurement or the thermal model that is related to this temperature is given in Temperature Nearest To Trip Level (AU.37). If
Percentage Of Drive Thermal Trip Level (J79) exceeds 90 % Drive Over Temperature Alarm (L22) is set to one. If Percentage Of Drive Thermal Trip
Level (J79) reaches 100 % one of the trips given in the table below is initiated. The trip can be reset when the percentage of thermal trip level fall
below 95 %.
Date (J80), Time (J81) and Day Of Week (J82) show the date and time as selected by Date/Time Selector (H32). Date (J80) stores the date in
dd.mm.yy format regardless of the setting made in Date Format (H33) however if the parameter is viewed using a keypad the date will be displayed in
the format selected in Date Format (H33). If a real time clock is selected from an option module then the days, months and years are from the real
time clock and the day of the week is displayed in Day Of Week (J82). Otherwise the days have a minimum value of 0 and roll over after 30, the
months have a minimum value of 0 and roll over after 11, and Day Of Week (J82) is always 0 (Sunday).
If when setting the date/time this parameter is being written via comms or from and applications module then the value should be written in standard
dd/mm/yy format as described below.
The value of this parameter as seen over comms or to an applications module is as follows.
Value = (day[1..31] x 10000) + (month[1..12] x 100) + year[0..99]
See Date (J80).
The value of this parameter as seen over comms or to an applications module is as follows.
Value = (hour[0..23] x 10000) + (minute[0..59] x 100) + seconds[0..59]
J79 Percentage Of Drive Thermal Trip Level
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum 100
Default Units %
Type 8 Bit Volatile Update Rate Background write
Display Format Standard Decimal Places 0
Coding RO, ND, NC, PT
Temperature Trip
Inverter Temperature (J77) OHt Inverter
Power system temperature OHt Power
Percentage Of DC Link Thermal Trip Level (J78) OHt dc Link
Control system temperature OHt Control
J80 Date
Mode Open-Loop, RFC-A, RFC-S
Minimum
0
(Display: 00-00-00)
Maximum
311299
(Display: 31-12-99)
Default Units
Type 32 Bit Volatile Update Rate Background read/write
Display Format Date Decimal Places 0
Coding RO, ND, NC, PT
J81 Time
Mode Open-Loop, RFC-A, RFC-S
Minimum
0
(Display: 00:00:00)
Maximum
235959
(Display: 23:59:59)
Default Units
Type 32 Bit Volatile Update Rate Background read/write
Display Format Time Decimal Places 0
Coding RO, ND, NC, PT
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