VONSCH VQfrem 400 protocol

Supported device types and versions

The protocol is used for communication with vector control frequency converters VQfrem 400 (for 3 x 400 V motors) from VONSCH. Reading values from inverters is supported. Commanding or writing values is not supported.

Communication line configuration

Communication line category: Serial, SerialOverUDP Device Redundant (serial communication).
Note: serial communication has been tested with a VQfrem 400 with 609h firmware.
Serial line setting: 19200 baud, 8 bits, no parity, 1 stop bit, RS-485 interface.
The serial line speed is configurable on the drive (2400 - 19200 baud).

Communication station configuration

Communication protocol: VONSCH VQfrem 400.
The station address is a 16-bit number (1-32767). It can be entered decimally (e.g., 1 or 1234) or hexadecimally using a hash (e.g. #0001 or #4D2).
Address 32768 (#8000) serves as a broadcast for commanding - all devices receive it, but none respond to it.

Station protocol parameters

Communication station - configuration dialog box - tab Protocol parameters.
They influence some of the optional parameters. You can set the following station protocol parameters:

Table 1

Parameter	Meaning	Unit	Default value
Full Debug	Logging of detailed debug information about communication in the line log.	-	NO
Retry Count	Maximum count of request retries. If no response returns after a request had been sent, the station's status will change to a communication error.	-	2
Retry Timeout	Timeout before resending a request if no response has been received.	ss.ms	0.1
Wait First Timeout	The delay after sending the request and before reading the response.	ss.ms	0.1
Wait Timeout	The delay between the response readings.	ss.ms	0.1
Max Wait Retry	The maximum number of retries of the response reading.	-	6

I/O tag configuration

I/O tags: Ai, Ci

I/O tag address

The address of the I/O tag is a 16-bit number (1-65535). It can be entered decimally (e.g. 1 or 1234) or hexadecimally using a hash (e.g. #0001 or #4D2).

A special symbolic address STATUS is also supported, which indicates the inverter status register in the form of an integer variable (for the meaning of individual bits, see Table 2).

Table 2 - Status register of a converter

Bit	Meaning	Logical 0	Logical 1

Bit	Meaning	Logical 0	Logical 1
0	Motor voltage	disconnected	connected
1	Converter is ready for START via serial link	not ready	ready
2	Converter is reset via serial link	OFF	ON
3	Reverse - required frequency or position is negative	OFF	ON
4	Motor ready	not ready	ready
5	Active set	SET1	SET2
6	Converter is reset	OFF	ON
7	Terminal switch 2	not ready	ready
8	Fault	didn’t occur	occurred
9	Warning	didn’t occur	occurred
10	Start / Stop	in stop	in start
11	End of trial operation	OFF	ON
12	Critical warning	didn’t occur	occurred
13	Frequency change at the output of ramp generator	not finished	finished
14	Position calibration command	not received	received
15	Password authorization	not valid	valid

Table 3 - Quantities available for reading according to the documentation

Address	Description	Meaning

Address	Description	Meaning
#0001	Software version	609h for ver. 6.09, (402h for ver. 4.02, 304h for ver. 3.04)
#0004	Voltage range	190h for 400V, 191h for 400 ...M, 2b2h for 690V
#0025	Freq. INV - the frequency of voltage on converter’s output (stator frequency)	+/- XXX,XX Hz
#0026	Revolves - output revolutions of the motor	+/- XXXX rev/min
#0027	Revol/i - evolutions behind gear/transmission	+/- XXXX,X rev/min
#0028	Freq.RT - rotor frequency (evaluated from speed encoder – IRC)	+/- XX,XX Hz
#0029	Freq.RF - required converter frequency	+/- XX,XX Hz
#002A	MT Curr. - effective current value into the motor	XXX,X A
#002B	R.torque - required mechanical motor torque	+/- XXX,X Nm
#002C	Torque - mechanical motor torque	+/- XXX,X Nm
#002D	Mag. flux - rotor magnetic flux	X,XXX Wb
#002E	Volt. MT - momentary motor supply voltage (100.0% responds to 400 V)	XXX,X %
#002F	Volt. DC - real voltage of converter’s unidirectional DC bus	XXX V
#0030	Inp.pow. - momentary input power into the motor	XXX,X kW
#0031	MT power - motor power	XXX,X kW
#0032	kW hours - motor energy consumption in kWh	XXXX kWh
#0033	MW hours - motor energy consumption in MWh	XXXX MWh
#0034	Teplota chladiča meniča	XX,X °C
#0035	Temp.INV. - air temperature in the converter	XX,X °C
#0036	PR ref. - required value of process regulator	XX,X %
#0037	PR real - feedback of process regulator (real value)	XX,X %
#0038	Inp. AIN1 - the value of analogue input AIN1 in % range	XX,X %
#0039	Inp. AIN2 - the value of analogue input AIN2 in % range	XX,X %
#003A	Hodnota analógového vstupu 3 v % rozsahu	XX,X %
#003B	BIN 1-6 - status of binary inputs BIN 1 - BIN 6 (bits 0-5 from the received value - bit numbering is from 0 to 15).	0=input is open 1=input is closed
#003C	RELAY 1-2,3 - the status of relay inputs RELAY 1 - RELAY 4 (bits 8-10 from the received value - bit numbering is from 0 to 15).	0=relay is open 1=relay is closed
#003D	Hours INV - converter operating time counter	XXXX h
#003E	Hours MT - motor operating time counter	XXXX h
#003F	Pos.ref. - required position in a case of „position“ variable	+/- XXXX,X cm
#0040	Position - real position	+/- XXXX,X cm
#0041	Pos. TSW2 - the trajectory for running down when Terminal switch TSW2 is on	+/- XXXX cm
#0042	Deviation from zero position when calibrating the ARC position sensor	XXXX d
#0043	cos(fi ) - momentary value of motor power factor	+/- X,XX
#0044	See Warnings register 2	-
#0045	See Warnings register 1	-
#0046	See the Faults register	-
#0048	Overload - a momentary value of overload	XXX.X %
#0049	Service SL - service displayed variable Slave	+/- XXXX d
#004a	Service MS - service displayed variable Master	+/- XXXX d

All values are transmitted as 16-bit numbers. The KOM process interprets them as signed or positive by address
(signed are #0025-#0029, #002B, #002C, #003F-#0041, #0043, #0049-#004a).

If the number is fractional, the corresponding linear conversion must be entered in the I/O tag configuration in the Conversion tab (e.g., coefficient A=0.1 for #0030, A=0.01 for #0028).

Table 4 - Faults register (values of the I/O tag with address #0045). If an arbitrary bit is set to logical 1, the corresponding fault/failure has arisen in the converter.

Bit	Meaning

Bit	Meaning
0	Converter Overcurrent
1	Converter Overload
2	Converter Undervoltage
3	Converter Overvoltage
4	Motor Overheat
5	Heatsink Temperature
6	Incorrect parameters of currents, motor constants, or speed
7	Regulation error
8	Identification error
9	Output short circuit
10	IRC failure (ARC), RM-ARC
11	Input or Output phase loss
12	External failure
13	Temperature in inverter
14	AIN1, AIN2, or AIN3 disconnected
15	reserved

Table 5 - Warnings register 1 (values of the I/O tag with address #0045). If an arbitrary bit is set to logical 1, the converter generates a corresponding warning.

Bit	Meaning

Bit	Meaning
0	some warnings W1-W5: W1 - The converter reduces motor magnetic flux in order to achieve over-synchronous revolutions. W2 - Magnetic flux has decreased to the minimal value at field suppression. W3 - Regulator of magnetic flux is saturated (only in vector mode). W4 - Regulator of motor torque is saturated (only in vector mode). W5 - Speed regulator is saturated (only in vector mode).
1	W6 - Motor cooler has reached an increased temperature (over 75 °C). For VQFREM 400 005, 007, and 011 types, the module temperature is over 90 °C