Kistler KiTorq 4542A Series User manual

Instruction
Manual
KiTorq Stator Torque
Evaluation Unit
Type 4542A...
Communication
ä
Part 3
002-617-3e-04.16

Foreword
002-617-3e-04.16 Page 1
Foreword
This instruction manual covers the communication protocol
of the Type 4542A... torque evaluation unit (stator) of the
KiTorq system.
Keep this instruction manual for future reference. It should
be available at the point of use.
Information in this instruction manual is subject to change
at any time, without notice. Kistler reserves the right to
improve and modify its products in the course of technical
advancement, without any obligation to inform any
persons or organizations of such changes.
Original language of this Instruction Manual: German
©2012 … 2016 Kistler Group. All rights reserved.

KiTorq Stator Torque Evaluation Unit Type 4542A...
Page 2 002-617-3e-04.16
Contents
1. Introduction................................................................................................................................................... 5
2. Features......................................................................................................................................................... 6
2.1Tips for Using these Operating Instructions......................................................................................... 6
2.2Nomenclature..................................................................................................................................... 6
3. Interface Commands...................................................................................................................................... 7
3.1Conventions and Syntax ..................................................................................................................... 7
3.2Glossary of Commands ....................................................................................................................... 9
3.3Error Messages ................................................................................................................................. 12
3.4HyperTerminal®................................................................................................................................ 13
3.5System.............................................................................................................................................. 17
3.5.1Identification (*IDN?) ......................................................................................................... 17
3.5.2Event Status Register (*ESR?) ............................................................................................. 18
3.6Measure ........................................................................................................................................... 20
3.6.1Determine Measured Values (MEAS) .................................................................................. 20
3.6.2Clear Peak Value Buffer (TRAC).......................................................................................... 21
3.6.3Switch Scaling Range (INP:GAIN:MULT)............................................................................. 22
3.6.4Control Signal (INP:CONT) ................................................................................................ 23
3.6.5Low Pass Filter Digital Measured Torque Values (OUTP:TORQ:FILT) ................................. 23
3.6.6Low Pass Filter Digital Measured Torque Values Measured Speed Values (OUTP:SPE:FILT) . 24
3.6.7Tare the Torque Outputs (OUTP:TARE) .............................................................................. 25
3.6.8Tare the Angle Output Signal (TRAC:ANG)......................................................................... 26
3.6.9Automatic tare of Angle Output Signal (SYST:SPE:TURN) ................................................... 26
3.6.10Number of output pulses (OUTP:SPE:IMP) ......................................................................... 26
3.6.11Synchronize Measured Values (INP:SYNC).......................................................................... 27
3.6.12Absolute/Relative Angle Measurement (SYST:SPE:MODE).................................................. 27
3.7Primary Voltage Output (Plug X3) ................................................................................................... 28
3.7.1Configuration (OUTP:PRI:VOLT:CONF) ............................................................................ 28
3.7.2Source (OUTP:PRI:VOLT:SOUR) ....................................................................................... 29
3.7.3Scaling Ranges (OUTP:PRI:VOLT[:EXT]:SCAL)................................................................... 29
3.7.4Low-Pass Filter (OUTP:PRI:VOLT[:EXT]:FILT) .................................................................... 30
3.7.5Taring (OUTP:PRI:VOLT:TARE) .......................................................................................... 31
3.7.6Output Swing Magnitude (OUTP:PRI:VOLT:MAGN)......................................................... 32
3.7.7Output Swing Magnitude for Control (OUTP:PRI:VOLT:CONT:MAGN) ............................ 32
3.7.8Digital Control Input (INP:PRI:VOLT:CONT)....................................................................... 33
3.8Secondary Output (plug X4) ............................................................................................................. 34
3.8.1Configuration (OUTP:SEC:CONF)....................................................................................... 34
3.8.2Source (OUTP:SEC:SOUR).................................................................................................. 35
3.8.3Output Signal Type (OUTP:SEC:ROUT)............................................................................. 36
3.8.4Scaling Ranges (OUTP:SEC[:EXT]:SCAL) ............................................................................. 37
3.8.5Low-Pass Filter (OUTP:SEC[:EXT]:FILT)............................................................................... 38
3.8.6Taring (OUTP:SEC:TARE).................................................................................................... 39
3.8.7Output Voltage Swing Magnitude (OUTP:SEC:VOLT:MAGN) ............................................ 40
3.8.8Output Voltage Swing Magnitude for Control (OUTP:SEC:VOLT:CONT:MAGN) ............... 40
3.8.9Frequency Output Zero Point (OUTP:SEC:FREQ:ZERO)...................................................... 41
3.8.10Output Frequency Swing Magnitude (OUTP:SEC:FREQ:MAGN)......................................... 41
3.8.11Output Frequency Swing Magnitude for Control (OUTP:SEC:FREQ:CONT:MAGN)............ 42
3.8.12Output Amplitude (OUTP:FREQ:AMPL) ............................................................................. 42
3.8.13Digital Control Input (INP:SEC:CONT) ................................................................................ 43
3.9Tare Button and LED......................................................................................................................... 44
3.9.1State of the Tare Button (INP:TARB) .................................................................................. 44
3.9.2State of the LED (OUTP:LED) ............................................................................................. 44
3.10Fieldbus/Industrial Ethernet (General Data)....................................................................................... 45
3.10.1Fieldbus/Industrial Ethernet Type (OUTP:FBUS:TYPE)......................................................... 45

Introduction
002-617-3e-04.16 Page 3
3.10.2Physical Plug Type (OUTP:FBUS:HARD) ............................................................................. 45
3.10.3Firmware Version (OUTP:FBUS:VER) .................................................................................. 46
3.11PROFINET ........................................................................................................................................ 46
3.11.1MAC Address (OUTP:FBUS:PN:MAC) ................................................................................ 46
3.11.2Device Name (OUTP:FBUS:PN:NAME) ............................................................................... 47
3.11.3IP Address (OUTP:FBUS:PN:[IP | ADDR])............................................................................ 47
3.11.4Subnet Mask (OUTP:FBUS:PN:GATE)................................................................................. 48
3.11.5Gateway Address (OUTP:FBUS:PN:GATE) .......................................................................... 48
3.11.6Define IP Address (OUTP:FBUS:PN:[IP | ADDR]:PWUP) ..................................................... 48
3.11.7Define Subnet Mask (OUTP:FBUS:PN:SUBN:PWUP) .......................................................... 49
3.11.8Define Gateway Address (OUTP:FBUS:PN:GATE:PWUP).................................................... 50
3.12PROFIBUS ........................................................................................................................................ 51
3.12.1Address (OUTP:FBUS:PB:ADDR) ........................................................................................ 51
3.12.2Baud Rate (OUTP:FBUS:PB:BAUD) ..................................................................................... 51
3.13CANopen ......................................................................................................................................... 53
3.13.1ID (OUTP:FBUS:CAN:ID).................................................................................................... 53
3.13.2Baud Rate (OUTP:FBUS:CAN:BAUD).................................................................................. 53
3.13.3TPDO Refresh Rate (OUTP:FBUS:CAN:PDO:RATE) ............................................................ 54
3.13.4Status (OUTP:FBUS:CAN:MODE)....................................................................................... 54
3.13.5Switch TPDO On and Off (OUTP:FBUS:CAN:TPDO).......................................................... 55
3.14EtherCAT.......................................................................................................................................... 56
3.14.1MAC Address (OUTP:FBUS:ECAT:MAC) ............................................................................ 56
3.15EtherNet/IP ...................................................................................................................................... 57
3.15.1MAC Address (OUTP:FBUS:EIP:MAC) ................................................................................ 57
3.15.2IP Address (OUTP:FBUS:EIP:[IP | ADDR]) ........................................................................... 57
3.15.3Subnet Mask (OUTP:FBUS:EIP:GATE)................................................................................. 58
3.15.4Gateway Address (OUTP:FBUS:EIP:GATE).......................................................................... 58
3.15.5Define IP Address (OUTP:FBUS:EIP:[IP | ADDR]:PWUP) ..................................................... 58
3.15.6Define Subnet Mask (OUTP:FBUS:EIP:SUBN:PWUP) .......................................................... 59
3.15.7Define Gateway Address (OUTP:FBUS:EIP:GATE:PWUP).................................................... 60
3.16Memory Area ................................................................................................................................... 61
3.16.1Load and Save Settings (MEM:[LOAD | SAVE]).................................................................. 61
3.16.2Digital Data Sheet .............................................................................................................. 62
4. PROFINET ................................................................................................................................................... 64
4.1Cyclical Input Data (for Sensor) ........................................................................................................ 64
4.2Cyclical Output Data (from Sensor) .................................................................................................. 67
4.2.1Status Bytes........................................................................................................................ 68
4.2.2Torque and Measured Value Status .................................................................................... 68
4.2.3Speed and Measured Value Status...................................................................................... 69
4.2.4Angle and Measured Value Status ...................................................................................... 70
4.2.5Rotor Temperature and Measured Value ............................................................................ 71
4.2.6GSDML-File........................................................................................................................ 71
5. PROFIBUS ................................................................................................................................................... 72
5.1Cyclical Input Data (for sensor)......................................................................................................... 72
5.2Cyclical Output Data (from sensor)................................................................................................... 75
5.2.1Status Bytes........................................................................................................................ 76
5.2.2Torque and Measured Value Status .................................................................................... 76
5.2.3Speed and Measured Value Status...................................................................................... 77
5.2.4Angle and Measured Value Status ...................................................................................... 78
5.2.5Rotor Temperature and Measured Value Status .................................................................. 79
5.2.6GSD File ............................................................................................................................. 79
6. CANopen .................................................................................................................................................... 80
6.1Cyclical Input Data RPDO 1 (for sensor) ........................................................................................... 80
6.2Cyclical Output Data TPDOs (from sensor)....................................................................................... 83
6.2.1TPDO 1 Torque.................................................................................................................. 83
6.2.2TPDO 2 Speed ................................................................................................................... 85
6.2.3TPDO 3 Rotor Temperature................................................................................................ 86

KiTorq Stator Torque Evaluation Unit Type 4542A...
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6.2.4TPDO 4 Angle .................................................................................................................... 87
6.2.5EDS File .............................................................................................................................. 88
7. EtherCAT ..................................................................................................................................................... 89
7.1Cyclical Input Data (for Sensor)......................................................................................................... 89
7.2Cyclical Output Data (from Sensor)................................................................................................... 92
7.2.1Status Bytes ........................................................................................................................ 93
7.2.2Torque and Measured Value Status .................................................................................... 93
7.2.3Speed and Measured Value Status ...................................................................................... 94
7.2.4Angle and Measured Value Status ...................................................................................... 95
7.2.5Rotor Temperature and Measured Value Status .................................................................. 96
7.2.6XML File............................................................................................................................. 96
8. Ethernet/IP .................................................................................................................................................. 97
8.1Cyclical Input Data (for Sensor)......................................................................................................... 97
8.2Cyclical Output Data (from Sensor.................................................................................................. 100
8.2.1Status Bytes ...................................................................................................................... 101
8.2.2Torque and Measured Value Status .................................................................................. 101
8.2.3Speed and Measured Value Status .................................................................................... 102
8.2.4Angle and Measured Value Status .................................................................................... 103
8.2.5Rotor Temperature and Measured Value Status ................................................................ 104
8.2.6EDS File ............................................................................................................................ 104
9. Index ......................................................................................................................................................... 105
Total pages 107

Introduction
002-617-3e-04.16 Page 5
1. Introduction
Thank you for choosing a quality product from Kistler.
Please read this instruction manual carefully, so that you
can put the many properties of your product to optimal
use.
Kistler declines any liability, to the extent permissible by
law, if action is taken contrary to this instruction manual, or
other products are used than those listed as accessories.
Kistler provides a wide range of metrology products and
overall solutions:
Piezoelectric sensors for measuring pressure, force, torque,
strain, acceleration, shock, and vibration
Strain gage sensor systems for measuring force and torque
Piezoresistive pressure sensors and transmitters, with
corresponding measuring amplifiers
Corresponding measuring amplifiers (charge amplifiers,
piezoresistive amplifiers, etc.), display units, and charge
calibrators
Electronic control, monitoring, and evaluation units, and
application-specific metrological software
Data transmission modules (telemetry)
Electromechanical NC joining modules and load-
displacement monitors
Test bench systems for electric motors and gears in the
lab, in production, and for quality assurance
Kistler also develops concepts for entire measurement
systems for special uses, such as in the automotive
industry, plastic processing, and biomechanics.
Our full catalog provides an overview of our product line.
Detailed data sheets area available for practically all of our
products.
For assistance with any special questions remaining after
studying these instructions, Kistler customer service is
available around the world with expert advice for
application-specific problems.

KiTorq Stator Torque Evaluation Unit Type 4542A...
Page 6 002-617-3e-04.16
2. Features
The following functions of the 454xA… torque evaluation
unit (stator) can be parameterized using the serial
interfaces:
Taring
Switch between scaling ranges
Define scaling ranges
Assign primary and secondary outputs
Query digital signal states
Query digital measurement values
Clear min/max peak value memory
Parameterize digital low-pass filter
2.1 Tips for Using these Operating Instructions
We recommend thoroughly reading the entire instruction
manual.
Keep this instruction manual in a safe location, where it is
always accessible. If the manual is lost, please contact the
responsible Kistler sales office or representative, and ask for
a replacement.
Modifications to the device (alterations, upgrades, etc.)
generally also lead to changes in the instruction manual. In
this case, contact the responsible Kistler sales office or
representative about ways to update your documentation.
2.2 Nomenclature
This is an explanation of the nomenclature used in this
instruction manual, including abbreviations:
T
yp
e 454xA... Torque Evaluation Unit Stator
T
yp
e 455xA… Torque Measuring Rotor Rotor

Interface Commands
002-617-3e-04.16 Page 7
3. Interface Commands
The RS-232C or USB interface can be used for
communication between the Type 454xA… KiTorq Stator
and a control PC. The ASCII commands to be used are
based on the SCPI-Standard (Standard Commands for
Programmable Instruments) standard, in order to make
communications as simple and clear as possible.
Parameters of the RS-232C interface:
57600 bits/second
8 data bits
1 Stoppbit
no parity
no flow control
Parameters of the USB interface:
921600 bits/second
8 data bits
1 Stoppbit
no parity
no flow control
Each ASCII command contains an ASCII string, followed by
a terminator. Commands are listed and described in the
following chapters. The terminator string is left off for ease
of reading.
3.1 Conventions and Syntax
The Type 454xA… torque evaluation unit (stator) responds
via the interface only if it receives a command from the
requestor (e.g., the PC). In other words, the PC is the
master, and the Type 454xA…is the slave. Master, Type
454xA… : Slave).
A response is always sent by the Type 454xA…
(acknowledgement), even if the requester sends only
configuration information.
The requester sends only ASCII commands, without
exception. A terminator string must always be added to the
end of these commands. The Type 454xA… transmits the
same terminator to the requester.
Syntax examples for determining torque:
Re
q
uester: MEAS:TORQ?<CR><LF>
T
yp
e 454xA… res
p
onds: 120,089<CR><LF>

KiTorq Stator Torque Evaluation Unit Type 4542A...
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Communication is not case-sensitive. The command
interpreter of the Type 454xA… also ignores any leading
spaces, or spaces within the command.
Examples:
T
yp
ical MEAS:TORQ?<CR><LF>
identical to MEAS :torq ? <CR><LF>
identical to MeaS :Torq?<CR><LF>
S
y
ntax and conventions
The end of a command string must always be indicated by
a terminator (<CR><LF>).
A command for a request ends with a question mark ("?"),
e.g. MEAS:TORQ?<CR><LF>.
When a configuration transmission has been sent
successfully, the numerical value zero ("0") is returned as
a confirmation.
Example:
Re
q
uester: OUTP:TARE:AUTO<CR><LF>
T
yp
e 454xA… res
p
onds: 0<CR><LF>
The period is used as the decimal symbol in floating point
numbers (e.g., 9.998).
If a command is not accepted for various reasons, then the
Type 4542A … torque evaluation unit returns a negative
error value.
Example of an incorrectly written command:
Re
q
uester: MEA:TORQ?<CR><LF>
T
yp
e
4
542A… res
p
onds: ERR-100<CR><LF>
Error values and their meanings can be found in the
chapter "Error messages".
For ease of reading, the terminator string (<CR><LF>) is
left off in the descriptions below.

Interface Commands
002-617-3e-04.16 Page 9
3.2 Glossary of Commands
The parts of the command follow the device structure, and
are marked by separators (":"). Each command part has
a maximum of four ASCII characters. The most important
command parts for the Type 454xA… torque evaluation
unit (stator) and similar Kistler products are listed below,
along with their assigned definitions:
Abbreviation Definition Meaning
ACTI ACTIve active branch
ADD ADDitional additional
ADDR ADDRess Address
ALER ALERt alarm signal
ALL ALL all
ANA ANAlogue analog branch
ANG ANGle angle
ARM ARMing arming signal
ASR AlertStatusRegister alarm event register
AUTO AUTOmatic automatic
AVER AVERage average value
BRID BRIDge bridge branch
BUFF BUFFer buffer area
CALC CALCulate calculation unit
CCW Counter Clockwise counterclockwise
CENT CENTer center
CLE CLEar clear
CLSE CLoSE close
CONT CONTrol controller signal
COUN COUNter counter (reading)
CW Clockwise clockwise
DEL DELete delete file
DIG DIGital digital
DIR DIRectory / DIRection file directory / direction
DISP DISPlay display
DOWN DOWN ab
DPT Decimal PoinT decimal point
ECAT EtherCAT EtherCAT
EIP EtherNet/IP EtherNet/IP
ENA ENAble enabled
ENG ENGlish English
ENTR ENTeR ENTER key
ERST External ReSeT external Reset
ESC ESCape cancel
ESR EventStatusRegister event register
ETH ETHernet Ethernet
EXT EXTended extended
FILE FILE file
FILT FILTer Filter
FOFF Frequency OFFset frequency offset
FRA FRAncais French

KiTorq Stator Torque Evaluation Unit Type 4542A...
Page 10 002-617-3e-04.16
FREQ FREQuency frequency measuring
branch
GATE GATEway address Gateway address
GER GERman German
HARD HARDware hardware
HIGH HIGH logical state 1
HOLD HOLD saved mode
HYST HYSTeresis hysteresis
IDN IDeNtification identification
IP IP address IP address
KEY KEY front button
LANG LANGuage language
LEFT LEFT left
LOAD LOAD load
LOW LOW logical state 2
LPFT Low Pass FilTer low pass filter
MAC MAC address MAC address
MAGN MAGNitude swing magnitude
MAX MAXimum maximum
MAXX X MAXimum X maximum
MAXY Y MAXimum Y maximum
MEAS MEASure measure
MEM MEMory memory
MENU MENU menu
MIN MINimum minimum
MINX X MINimum X minimum
MINY Y MINimum Y minimum
MODE MODE mode
MULT MULTiplicate multiple ranges
NAME NAME Name
NOM NOMinal nominal
NONE NONE none
NORM NORM normal mode
OFF OFF turned off
ON ON turned on
OPEN OPEN open
OUTP OUTPut output
PN PROFINET PROFINET
POST POST after
POW POWer mech. power
PRE PRE before
PULS PULSe impulse
PWUP PoWerUP After switch on
RANG RANGe range
RFRH ReFResH update
RGHT RiGHT right
ROUT ROUTe measuring branch
SAVE SAVE save
SECN SECoNd second
SENS SENSe sensor unit
SOUR SOURce source

Interface Commands
002-617-3e-04.16 Page 11
SPE SPEed speed
STAT STATus status
SUBN SUBnet mask subnet mask
SYNC SYNChronisation synchronisation
TARB TARa Button tare button
TARE TARE set zero point
TARG TARGet target
TARP TARa by PLC tare by PLC
TEMP TEMPerature temperature
THR THReshold limit value
TIME TIME time
TORQ TORQue torque
TRAC TRACe volatile memory
TRIG TRIGger trigger
TSR TriggerStatusRegister trigger status register
UNIT UNIT unit
UP UP up
VAL VALue value
VER VERsion version

KiTorq Stator Torque Evaluation Unit Type 4542A...
Page 12 002-617-3e-04.16
3.3 Error Messages
The Type 454xA… torque evaluation unit transmits
a negative error value ("ERR-xxx") via the interface if
a command is not accepted for various reasons (see table
below).
Error value Error description Corrective action
ERR–100 Command not understood.
Check command syntax.
Send command again. Type
454xA… may be busy.
ERR–101 "?" was not added for a query.
Add "?" for a query.
ERR–104 Calculation steps caused an overflow.
Check calculation
variables
(for internal company use).
ERR–105 Error accessing non-volatile buffer memory.
Redefine buffer memory,
inform Kistler.
ERR–106 Access to protected buffer memory.
Remove memory protection (for
internal company use).
ERR–108 Transmitted string too long.
Shorten string
(for internal company use).
ERR–109 Transmitted numerical value is invalid.
Check numerical value
(for internal company use).

Interface Commands
002-617-3e-04.16 Page 13
3.4 HyperTerminal®
Microsoft® HyperTerminal® can be used for basic
communication via the RS-232C or USB interface.
Commands are entered manually, sent to the Type
454xA…, and shown on the PC screen as acknowledged.
Using HyperTerminal® , it is possible to open simple
communications for initial commissioning or service
functions.
Configuration of the Type 454xA… and HyperTerminal is
explained in more detail in the following example.
Start HyperTerminal® from the Windows® PC’s Start
group.
HyperTerminal® suggests a new connection. A name must
be defined to identify the connection, e.g. "454xA". The
HyperTerminal® settings can be saved later on the
desktop, and any desired symbol can be selected.
Confirm the entry with the "OK" button.
The RS-232C or USB interface connection is then defined.
The USB interface is shown as a virtual COM port in the
PC system, such as "COM12".
Confirm the configuration with the "OK" button.

KiTorq Stator Torque Evaluation Unit Type 4542A...
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The properties of the virtual COM port are defined for the
USB interface as follows:
921600 bits/second
8 data bits
no parity
1 Stoppbit,
no flow control
Transmission s
p
eed for RS-232C and USB cables
The definition of the transmission speed (baud rate) depends
on the length and quality of the cable.
Terminate the connection between HyperTerminal and the
Type 454xA… by clicking the "Hang up" symbol
because the terminal settings must first be entered
(alternatively, the menu selection "Call" "Hang up" can
be used to terminate the connection).
Use the "Properties" symbol to open the window
with the COM port and terminal settings (alternatively, use
the menu selection "File" "Properties").

Interface Commands
002-617-3e-04.16 Page 15
In the "Properties" window, click on the "Settings" tab.
The following settings must be made. They generally
match the standard settings:
Function key assignments: Terminal
Backspace sends: Strg+H
Emulation: Auto-detection
Telnet terminal detection: ANSI
Lines in screen buffer: 500
Clicking on the "ASCII Configuration" button opens the
window for defining the sent and received ASCII
characters. The following settings should be used:
Sent lines end with a line feed.
Show entered characters locally (local echo).
Confirm the settings with the "OK" button.
Also close the "Properties" window by clicking on the
"OK" button.
The connection to the Type 454xA… can now be
established by clicking on the "Call" symbol
(alternatively, use the menu selection "Call" "Call").

KiTorq Stator Torque Evaluation Unit Type 4542A...
Page 16 002-617-3e-04.16
To test the connection, enter the identification command
"*idn?" at the keyboard, and confirm with the ENTER key.
The Type 454xA… torque evaluation unit will respond with
the identifier string.
Command conventions and useful entr
y
aids
Commands are not case-sensitive. Spaces are also ignored.
The asterisk symbol ("*"), which must be included for special
commands under the SCPI standard, can be left out. For
example, "*IDN?" is identical to "IDN?"
In order to correct commands that were entered incorrectly,
the backspace key can be used to delete individual characters.
Entering an exclamation point ("!", Shift+1 key) causes
HyperTerminal®to display again the last command sent to
the Type 454xA….
The HyperTerminal®settings can be saved to the PC
desktop. This makes future access to HyperTerminal®faster
and easier.
To do this, open the Save window in HyperTerminal®
using the menu selection "File" "Save as …".
Select the save location as "Desktop" and save the file as
"454xA.ht" by clicking on the "Save" button.
The assigned symbol then appears on the desktop. It can
be clicked at any time to start HyperTerminal®with the
previously saved settings.



Interface Commands
002-617-3e-04.16 Page 17
3.5 System
3.5.1 Identification (*IDN?)
*IDN?
This command identifies the Type 454xA… torque
evaluation unit and the corresponding torque measuring
rotor. The following contiguous ASCII identifier is sent as
a response:
Kistler_4542AStator_jjjj-mm-tt_vvvv_
xxxxx_yyyy-mm-dd_vvvv
Where:
Kistle
r
Kistler Lorch GmbH
4
542AStato
r
Typ "4542A" Torque evaluation unit
(stator).
yyyy
-mm-dd Date in the format
year-month-day
vvvv Version number, in the format Vx.xx
xxxxx Torque measuring unit (rotor)
e.g. "4550ARotor"
Syntax example:
*IDN?
Kistler_4542AStator_2012-11-03_V2.03_
4550ARotor_xxxx-xx-xx_V5.6

KiTorq Stator Torque Evaluation Unit Type 4542A...
Page 18 002-617-3e-04.16
3.5.2 Event Status Register (*ESR?)
*ESR?
This command reads the event status register. The internal states
of the Type 454xA… are mapped to the contents.
Empty bit fields in the ESR register are unoccupied, and have
a value of 0. When initially powered up, the Type 454xA… clears
the ESR register, and then sets the PON bit (power on).
ESR register
Bit D7 D6 D5 D4 D3 D2 D1 D0
Event PO
N NSE --- EXE SC ALE RNG OPC
Signifi-
cance
128
(27)
64
(26)
32
(25)
16
(24)
8
(23)
4
(22)
2
(21)
1
(20)
Value 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
Definition:
0Event bit is not set
1Event bit is set
Event bits:
PON Power on state (power on)
This bit is set when the Type 454xA… is in
measurement mode.
NSE Modified configuration data (new settings)
This bit is set when modifications are made to the
configuration or state of the digital inputs (e.g.,
taring) of the Type 454xA... .
EXE Error in execution (execution error)
This bit is set if an impermissible command is sent
to the Type 454xA... .

Interface Commands
002-617-3e-04.16 Page 19
SC Functional sensor test (sensor check)
This bit is set when the functional test of the
connector sensor has been activated, (also known
as the control or calibration signal).
ALE Limit value exceeded (alert occurred)
This bit is set when a limit value is exceeded.
RNG Scaling range (scaling range)
This bit is set if the second scaling range is active.
OPC Finished processing (operation complete)
This bit is set when a command has been
completed successfully.
The ESR register is output in decimal format
(0dec … 255dec). The set bits are cleared after the ESR
register is transmitted.
Syntax example:
*ESR?
129 (PON and OPC bits are set)