Menu 7 − Analog I/O

Mode: RFC‑A

Analog Outputs
The update rate for analog outputs is 250μs; although the output will only change at the update rate defined by the source parameter for the input. The following exceptions apply:

  1. Speed Feedback (03.002) has an update rate of 4ms and includes a 16ms window filter. If this parameter is selected as a source for output 2 the update rate of the source changes to 250us and the only filter applied is the window filter associated with the position feedback interface (i.e. P1 Feedback Filter (03.042) for the P1 interface). It should be noted that this feature is only provided when the position feedback is from a drive interface and not from an option module.
  2. If either analogue output is set up for current mode then the update rate for both analogue outputs is 4ms.

Analog Inputs
The normal sample rate for the analog inputs is 4ms, however this is increased to 250us for analogue inputs 1 and 2 under the following conditions:

  1. The maximum and the minimum for the input are at their default values of 100.00% and -100.00% respectively.
  2. The input is set to voltage mode.
  3. One of the destinations given in the table below must be selected.
  4. If the destination is Analog Reference 1 (01.036) or Analog Reference 2 (01.037) the reference system must not be in uinpolar mode, i.e. Bipolar Reference Enable (01.010) must be one.

Note that Analogue Input 1 Fast Update Active (07.026) and Analogue Input 2 Fast Update Active (07.027) indicate if fast updating is active for each input.

Parameter Drive modes Comment
Analog Reference 1 (01.036) RFC-A, RFC-S The data from Analog Reference 1 (01.036) is processed in the 250us task so that the reference to the speed controller is updated every 250us. 
Analog Reference 2 (01.037) RFC-A, RFC-S The data from Analog Reference 2 (01.037) is processed in the 250us task so that the reference to the speed controller is updated every 250us. 
Hard Speed Reference (03.022) RFC-A, RFC-S
Torque Reference (04.008) RFC-A, RFC-S
Power Input 1 (03.010)
Power Input 2 (03.013)
Power Input 3 (03.014)
Regen

 

 


Parameter07.004  Monitored Temperature 1
Short descriptionDisplays the temperature set up by Temperature Monitor Select 1
ModeRFC‑A
Minimum-250Maximum250
Default Units°C
Type16 Bit VolatileUpdate RateBackground write
Display FormatNoneDecimal Places0
CodingRO, ND, NC, PT

Thermal monitoring is provided within the drive to protect the power stage and the control system from over temperature.

Monitored Temperature 1 (07.004), Monitored Temperature 2 (07.005) and Monitored Temperature 3 (07.006) give an indication of the temperature of three selected monitoring points within the drive power system or control system. The required monitoring points can be selected using Temperature Monitor Select 1 (07.038), Temperature Monitor Select 2 (07.039) and Temperature Monitor Select 3 (07.052) respectively. The default values give two monitoring points in the power system in Monitored Temperature 1 (07.004) and Monitored Temperature 2 (07.005), and control board temperature 1 in Monitored Temperature 3 (07.006).


Parameter07.005  Monitored Temperature 2
Short descriptionDisplays the temperature set up by Temperature Monitor Select 2
ModeRFC‑A
Minimum-250Maximum250
Default Units°C
Type16 Bit VolatileUpdate RateBackground write
Display FormatNoneDecimal Places0
CodingRO, ND, NC, PT

See Monitored Temperature 1 (07.004) for details.


Parameter07.006  Monitored Temperature 3
Short descriptionDisplays the temperature set up by Temperature Monitor Select 1
ModeRFC‑A
Minimum-250Maximum250
Default Units°C
Type16 Bit VolatileUpdate RateBackground write
Display FormatNoneDecimal Places0
CodingRO, ND, NC, PT

See Monitored Temperature 1 (07.004) for details.


Parameter07.033  Power Output
Short descriptionInstant output power
ModeRFC‑A
Minimum-100.0Maximum100.0
Default Units%
Type16 Bit VolatileUpdate Rate250µs write
Display FormatNoneDecimal Places1
CodingRO, ND, NC, PT

This is an instantaneous power output with fast update rate that is primarily intended to be used as a power feed-forward for applications with a Regen system front end. The full scale (100.0%) value is equal to a power of 3 x (VM_DC_VOLTAGE[MAX] / 2√2) x Full Scale Current Kc (11.061). This is compatible with the power output provided in Unidrive SP and is directly comptible with Power Input 1 (03.010) (and the other power feed-forward parameters) in Regen mode. The scaling is intended to cover the maximum range of likely power in the drive. For example with a 400V 7.5kW drive the full scale d.c. link voltage is 831V and Kc=38.222A, and so the full scale value of this parameter is 3 x (831 / 2√2) x 38.222 = 33.689kW. For Open-loop, RFC-A and RFC-S modes a positive value of power indicates power flowing from the drive to motor. For Regen mode a positive value of power indicates power flowing from the supply to the regen drive.


Parameter07.034  Inverter Temperature
Short descriptionDisplays the estimated junction temperature of the hottest power device within the drive inverter
ModeRFC‑A
Minimum-250Maximum250
Default Units°C
Type16 Bit VolatileUpdate RateBackground write
Display FormatNoneDecimal Places0
CodingRO, ND, NC, PT

Inverter Temperature (07.034) shows the estimated junction temperature of the hottest power device within the drive inverter. If this temperature exceeds the switch down threshold defined for the power stage the switching frequency is reduced provided this feature has not been disabled (see Auto-switching Frequency Change Disable (05.035)).


Parameter07.035  Percentage Of d.c. Link Thermal Trip Level
Short descriptionDisplays the percentage of the maximum allowed temperature as estimated by the thermal model of the d.c. link components
ModeRFC‑A
Minimum0Maximum100
Default Units%
Type8 Bit VolatileUpdate RateBackground write
Display FormatNoneDecimal Places0
CodingRO, ND, NC, PT

Percentage Of d.c. Link Thermal Trip Level (07.035) gives the percentage of the maximum allowed temperature as estimated by the thermal model of the d.c. link components.


Parameter07.036  Percentage Of Drive Thermal Trip Level
Short descriptionDisplays the percentage of the thermal trip level of the temperature monitoring point or thermal model in the drive that is highest
ModeRFC‑A
Minimum0Maximum100
Default Units%
Type8 Bit VolatileUpdate RateBackground write
Display FormatNoneDecimal Places0
CodingRO, ND, NC, PT

Percentage Of Drive Thermal Trip Level (07.036) 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 (07.004), Monitored Temperature 2 (07.005) and Monitored Temperature 3 (07.006)), Inverter Temperature (07.034) and Percentage Of d.c. Link Thermal Trip Level (07.035).

Percentage Of d.c. Link Thermal Trip Level (07.035) is used directly to give Percentage Of Drive Thermal Trip Level (07.036), but for all other monitored values which are temperatures this is given by Percentage of thermal trip level = (Temperature - 40oC) / (Trip temperature - 40oC) 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 (07.037). If Percentage Of Drive Thermal Trip Level (07.036) exceeds 90% Drive Over-temperature Alarm (10.018) is set to one. If Percentage Of Drive Thermal Trip Level (07.036) 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%.

Temperature Trip
Inverter Temperature (07.034) OHt Inverter
Power system temperature OHt Power
Percentage Of d.c. Link Thermal Trip Level (07.035) OHt dc Link
Control system temperature OHt Control


Parameter07.037  Temperature Nearest To Trip Level
Short descriptionDisplays the thermistor location or the model that corresponds to the value shown in Percentage Of Drive Thermal Trip Level
ModeRFC‑A
Minimum0Maximum20999
Default Units 
Type16 Bit VolatileUpdate RateBackground write
Display FormatNoneDecimal Places0
CodingRO, ND, NC, PT

Temperature Nearest To Trip Level (07.037) shows the thermistor location or the model that corresponds to the value shown in Percentage Of Drive Thermal Trip Level (07.036) in the form xxyzz as shown in the table below.

Source xx y zz
Control system 00 0 01: Control board thermistor 1
Control system 00 0 02: Control board thermistor 2
Control system 00 0 03: I/O board thermistor
Control system 00 1 00: Inverter thermal model
Control system 00 2 00: D.c. link thermal model
Control system 00 3 00: Braking IGBT thermal model
Power system 01 0 zz: Thermistor location defined by zz in the power system
Power system 01           Rectifier number zz: Thermistor location defined by zz in the rectifier


Parameter07.038  Temperature Monitor Select 1
Short descriptionDefines the temperature to be monitored in Monitored Temperature 1
ModeRFC‑A
Minimum0Maximum1999
Default1001Units 
Type16 Bit User SaveUpdate RateBackground read
Display FormatNoneDecimal Places0
CodingRW

Temperature Monitor Select 1 (07.038) selects the temperature to be monitored in Monitored Temperature 1 (07.004) using the format given for Temperature Nearest To Trip Level (07.037). If the monitoring point selected does not exist then the monitored temperature is always zero. The table below shows the monitoring points that can be selected.

Source xx y zz
Control system 00 0 01: Control board thermistor 1
Control system 00 0 02: Control board thermistor 2
Control system 00 0 03: I/O board thermistor
Control system 00 1 00: Inverter thermal model
Control system 00 3 00: Braking IGBT thermal model
Power system 01 0 zz: Thermistor location defined by zz in the power system
Power system 01       Rectifier number zz: Thermistor location defined by zz in the rectifier


Parameter07.039  Temperature Monitor Select 2
Short descriptionDefines the temperature to be monitored in Monitored Temperature 2
ModeRFC‑A
Minimum0Maximum1999
Default1002Units 
Type16 Bit User SaveUpdate RateBackground read
Display FormatNoneDecimal Places0
CodingRW

See Temperature Monitor Select 1 (07.038).


Parameter07.052  Temperature Monitor Select 3
Short descriptionDefines the temperature to be monitored in Monitored Temperature 3
ModeRFC‑A
Minimum0Maximum1999
Default1Units 
Type16 Bit User SaveUpdate RateBackground read
Display FormatNoneDecimal Places0
CodingRW

See Temperature Monitor Select 1 (07.038).