Baumer N 140 User Manual

Operating instructions

Interface Description
N 140 Spindle Positioning Display (SPA)
Software 01 Version 3.10 and up

Contents Page

1. General information 2

1.1. Safety precautions 2

1.2. SPA description and explanation 3

2. Terminal assignment 4

3. Interface 5

3.1. Interface data 5

3.2. Protocol 5

3.3. Redundancy check (CRC byte) 5

3.4. Broadcast commands 6

3.5. Data saving 6

4. Command explanations 6

4.1. General information 6

4.2. Operating commands 6

4.3. Parameter commands 11

4.4. Identifier commands 14

4.5. Specific commands 15

5. Error warnings 17

5.1. CRC error 17

5.2. Format error 17

6. Overview on commands 17

7. Technical data 18

7.1. Dimensions 19

8. Part number 19

Baumer IVO GmbH & Co. KG 05.11

Dauchinger Strasse 58-62 • DE-78056 Villingen-Schwenningen Subject to modification
Phone [phone] • Fax [phone] in technic and design.
www.baumer.com • [e-mail]

• 171.01.265/4

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1. General information

1.1. Safety precautions

General remarks

The equipment is designed and assembled according to the prevailing regulations of technology. The
equipment left the manufacturer in perfect working order and in line with all safety-relevant conditions. To
maintain this status of the equipment, it is imperative to stick to the following when installing and using the
device:

- use only according to the intended purpose,

- observation of any precautions regarding safety and hazards,

- observe the present manual and especially the relevant safety precautions!

Make sure that the operating manual and especially the chapter describing the safety precautions is read and
well understood by the staff in charge. Supplementary to the operating instructions, ad other generally or legally
relevant regulations regarding accident prevention and environmental care are to be considered and observed.
This manual is a supplement to already existing documentation (product information, mounting instructions,
catalogues).

Intended purpose of the equipment

Intended purpose of the equipment is industrial process monitoring and control in metal, wood, plastic, paper,
glass and textile etc. industry.
It is imperative that the equipment is applied only

- in properly installed condition and

- in line with the relevant technical data!

Any operation outside the technical specifications/parameters is improper use and in conjunction
with the equipment/processes/machines to be monitored/controlled might lead to

- fatal injuries

- serious damage to health,

- damage to property or corporate equipment or

- damage to the device!

Any overvoltage the device might be exposed to at its connecting terminals has to be limited to the values
stipulated in overvoltage category II (see technical data).

The device must not be operated

- in hazardous areas where is danger of explosion,

- as medical equipment or in medical areas,

- or in any applications expressly named in EN 61010!

If the device is utilized for control/monitoring of machines or processes where as the result of a
failure/malfunction or incorrect operation of the device might occur

- any threats to life,

- risks of damage to health or

- any risk of damage to property or environment
The corresponding appropriate safety precautions must be taken!

Do not open the housing of the device or proceed any modifications! Tampering with the device can affect
operating safety and result in danger!
Do not proceed any repairs but return defective devices to the manufacturer!

Installation/Commissioning

In case of any extraordinary incidents (including in the operating behaviour) that impair safety switch off the
device immediately.
Installation must be carried out by suitably trained experts only. After proper mounting and installation the
device is ready for operation

Maintenance/repairs

Always disconnect the power supply of all appliances involved. Maintenance and repair work must only be
carried out by suitably trained experts.
If troubleshooting is unsuccessful, do not continue using the device but contact the manufacturer.

.

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1.2. SPA description and explanation

Mounting the spindle position display (SPA) is by docking the hollow shaft to the end of the spindle shaft. The
hollow shaft is fixed by hexagon screw to the spindle shaft and secured by power grip.
This way, the SPA is mounted over-hung and secured against torsion at rear of the housing by the attached
spreader pin. The spindle position display features an absolute multiturn sensing system allowing to capture the
position after several turns of the spindle even in powerless status. The position data will be retained even in
case of power failure (min. 10 years).
The current position value is displayed in the two-line backlit LCD display (2x 6 digits, numeric). Simultaneously,
in the same display the target transmitted by the control (master) is indicated. Two arrows show the editing
engineer the direction the spindle is to be turned in order to align the current value with the target. As soon as
the current value equals the target and is within the allowable tolerance, the target will disappear. The SPAs are
networked by 30 cm cable providing male and mating connector.

Upper line of the display, „target“

Arrows indicating the direction of rotation for target/current value alignment

Bottom line of the display, „current value“

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2. Terminal assignment

Pin Assignment Core colour DIN47100

IEC757

Pin 1 Sensor supply +24 V yellow red

Pin 2 Sensor supply 0 V green black

Pin 3 -- -- --

Pin 4 Tx/Rx+, RS485 brown brown

Pin 5 Tx/Rx-, RS485 white orange

Male connector M16 Female connector M16

3

4

2

1

5

3

2

1

4

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Connect power supply that is free from interference emission. The supply must not be used as
parallel supply of drives, shields, magnetic valves, etc.
Apply DC according to the terminal assignment
Power supply: 24 VDC ±10 %

Shield

Use shielded cables only. Ground of the shield must be provided at the machine (two examples
corresponding to the cable applied, see drawings).

Abschirmungsanschluss

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3. Interface

3.1. Interface data

Typ: RS485

Baudrate: 19200

Parity: No

Data bits: 8

Stop bits: 1

Handshake: No

Redundancy check: Yes (CRC)

Timeout reply*: 0,1...60 ms

BUS switching time**: <0,1 ms

3.2. Protocol

The spindle position display operates with ASCII protocol (clear text protocol). Depending on the command, the
protocol data package varies between 5 and 17 bytes.

Byte Hex-Code Significance Parameters

1 01H SOH = start of heading permanent 01h
2 XXh Adr = address/identifier 00 ... 31dez + 20h Offset (identifier 00 = 20h)
3 XXh Cmd = command code Defined commands

4-n [XXh..XXh] [Data] = data 20h-7Fh
n+1 04h EOT = end of transmission Permanent 04h
n+2 XXh CRC = redundancy check 00h ... FFh

3.3. Redundancy check (CRC byte)

For optimized error-free data transmission the CRC byte is added after the footer token (EOT, end of
transmission) to the string to be transferred. Upon receiving a command the CRC byte transmitted is
crosschecked with the auto-calculated CRC byte.

Algorithm:

1) Reset CRC byte.

2) Rotate CRC byte by 1 bit to the left.

3) Link result to first data byte XOR.

4) Rotate result by 1 bit to the left.

5) Link result to the second data byte XOR.
:
x) Rotate result by 1 bit to the left.
y) Link result to the last data byte (ever 04H) XOR.
z) Add result as CRC after the footer token (04H) to the transmitted string.

Note:

Example:

String less CRC = 01h 20h 43h 04h
CRC-Byte = 0Ah

0000 0000 RL 0000 0000 XOR 0000 0001 (01h) = 0000 0001

0000 0001 RL 0000 0010 XOR 0010 0000 (20h) = 0010 0010

0010 0010 RL 0100 0100 XOR 0100 0011 (43h) = 0000 0111

0000 0111 RL 0000 1110 XOR 0000 0100 (04h) =

Legend: RL = rotate left; XOR = antivalence link

1101 0000 RL 1010 0001 Important: Bit 7 is shifted in bit 0 during rotation

* To avoid bus collisions a minimum timeout reply of 1 ms (default parameter)

is to be kept, i.e. the time elapsed between transmitting the last bit of the
query until start transmitting the 1st bit of the SPA response.
The operator should see that due to the minimized timeout reply of 1 ms
the bus switching time after having transmitted the last bit must not exceed
1 ms.

The default parameter of 1 ms can optionally be altered by serial interface

in steps of 0,1 ms within the range of 0,1 ... 60 ms.
Refer to command „x“ (78h).

** The BUS switching time is the time the SPA requires to be ready again for

reception after having replied to the host

0000 1010

= CRC

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3.4. Broadcast commands

Some specific commands are defined as so-called broadcast commands. As soon as the master broadcasts a
command to identifier 99, the command is addressed to every SPA in the network. Each individual spindle
position display will accomplish the respective command but will not respond any confirmation to master.

3.5. Data saving

Specific parameters are saved in EEPROM (1.000.000 writing cycles). Data saving is via interface upon every
parameter transmission to SPA.

Important:

These parameters should not be transmitted to SPA cyclic but only if necessary, for example in case of
parameter alteration. The relevant parameters that are saved in EEPROM are listed in the charts in chapter
“Command explanations” or “Overview on commands”.

4. Command explanations

4.1. General information

The following is describing the individual interface commands broken down into the four groups below:

- operating commands [ commands required during operation ]

- parameter commands [ commands for SPA parameterization ]

- identifier commands [ commands to indicate or alter the device identifier (address)]

- specific commands [ commands for specific functions as device reset or version number readout]

The following abbreviations are applied:

SOH = Start of heading (header token)
EOT = End of transmission (footer token)
Adr = Device address, including offset 20h
Cmd = Command
Data = data transmitted or received

4.2. Operating commands

Command

code

C (43h) 3 / 11 X - - - Check if current value = target
R (52h) 6 X - - - Read current value
S (53h) 8 X X - X Read/write target
U (55h) 6 X X - - Offset
V (56h) 2 X X X X Read/write profile number
Z (5Ah) 6 X X X X Set preset

t (74h) 6 - X - - Transmit tool number

u (75h) 6 - X - - Transmit any optional number sequence

Data amount

in bytes

read write Broad-

cast

Save in

EEPROM

Significance

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4.2.1. Check Position, command „C“ (43h)

This command provides the alignment status of target versus current value. If the current value is within the
target tolerance window, the response will be „o“ (6Fh) for OK together with the current profile number. If the
current value is outside the tolerances, „x“ (78H) followed by the current profile number will be replied.

Example: (active profile number = 05)

Transmission

SOH Adr Cmd EOT CRC

01h 20h 43h 04h 0Ah

Response if current value is within tolerance window:

Response

Response in case of current value is outside the tolerance window:

Response

SOH Adr Cmd Stat. Profile no.=05EOT CRC

01h 20h 43h

SOH Adr Cmd Stat. Profile no.=05EOT CRC

01h 20h 43h

6Fh 30h 35h

78h 30h 35h

04h A5h

04h 1D

Following status parameters are available:

Status Significance
o (6Fh) Current value = target
x (78h) Current value ≠ target
e (65h) SPA error

Command extension Check Position „CX“

The command extension „Check Position CX “provides besides the alignment status target versus current value
also the contents of the status and error register as well as the current value. The profile number is not
transmitted.

Note: N140 spindle positioning display does not provide any status or error register. For reasons of
compatibility to other multicon equipment here permanent parameter 80h is transmitted, i.e. the 4 data bytes are
not significant.

Example:

Transmission

Response

SOH Adr Cmd

01h 20h 43h 58h 04h A8h

SOH Adr Cmd Stat. Status-Reg Error-Reg Current value = -12,50 EOT CRC

01h 20h 43h

SCmd

EOT CRC

6Fh 80h 80h 80h 80h 2Dh 30h 31h 32h 35h 30h

04h B7h

4.2.2. Read parameter current value, command „R“ (52h)

This command is for readout of the 6-digit current value (bottom line of display). The amount of data is always 6
bytes. In case of a negative value, the “-“ sign (2Dh) together with 5 data bytes is replied. Positive values are
represented by 6 data bytes without sign. Values of less than 6 (5) digits will come with preceding zeroes.

Example: Current value = -32,50

Transmission

Response

SOH Adr Cmd EOT CRC

01h 20h 52h 04h 40h

SOH Adr Cmd Current value = –32,50 EOT CRC

01h 20h 52h

2Dh 30h 33h 32h 35h 30h

04h 54h

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4.2.3. Read / write parameter target (profile), command „S“ (53h)

This command is for readout the presently active target or for programming respectively reading a specific
target. The data are composed of profile number (2 bytes) and target (6 bytes). Important: Negative targets
come with 5 digits only (see example no. 3).

Example 1: Read active target (current profile number = 12; target = 12,50)

Transmission

Response

Response upon deletion of all targets:

Response

SOH Adr Cmd EOT CRC

01h 20h 53h 04h 2A

SOH Adr Cmd Profile no. = 12 Target = 12,50 EOT CRC

01h 20h 53h

SOH Adr Cmd Profile no. =

01h 20h 53h

31h 32 30h 30h 31h 32h 35h 30h

FFh

3Fh 3F 3Fh 3Fh 3Fh 3Fh 3Fh 3Fh

Target = FFFFFFh EOT CRC

04h 3E

04h 2Ah

Example 2: Read target of a specific profile (profile number = 17; target = 12,50)

Transmission

Response

SOH Adr Cmd Profile no. = 17 EOT CRC

01h 20h 53h

SOH Adr Cmd Profile no. = 17 Target = 12,50 EOT CRC

01h 20h 53h

31h 37h

31h 37h 30h 30h 31h 32h 35h 30h

04h 16h

04h BCh

Example 3: Write target of a specific profile (profile number = 17; target = -12,50)

s

Transmission

Response

SOH Adr Cmd Profile no. = 17 Target = -12,50 EOT CRC

01h 20h 53h

SOH Adr Cmd Profile no. = 17 Target = -12,50 EOT CRC

01h 20h 53h

31h 37h 2Dh 30h 31h 32h 35h 30h

31h 37h 2Dh 30h 31h 32h 35h 30h

04h FBh

04h FBh

Direct positioning „SD“

This command may be utilized for direct positioning operations with direct programming of a position value.
Only the target less any profile number is transmitted to SPA. The profile number after the command “S” is
replaced by sub command “D” (0 = dimension). Any previously programmed profiles are not overwritten.

Example 4: Write position value for direct positioning (less profile)

Transmission

Response

SOH Adr Cmd Sub Position value = 278,25 EOT CRC

01h 20h 53h

SOH Adr Cmd Sub Position value = 278,25 EOT CRC

01h 20h 53h

44h 30h 32h 37h 38h 32h 35h

44h 30h 32h 37h 38h 32h 35h

04h 6Bh

04h 6Bh

Note: The position value is saved in the non-volatile memory and will be retained in case of power failure. In this
case the previously selected profile will be applied again.
If an IVO master is utilized, the target is reset to the previously defined profile value after having quit dimension
mode (DIM mode).

4.2.4. Read / write parameter profile number, command „V“ (56h)

This command is for readout the number of the presently active profile respectively for profile alteration.

Example 1: Read active profile (active profile number = 38)

Transmission

Response

SOH Adr Cmd EOT CRC

01h 20h 56h 04h 20h

SOH Adr Cmd Profile no. = 38 EOT CRC

01h 20h 56h

33h 38h

04h 28h

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Response after reset upon deletion of all profiles:

Response

SOH Adr Cmd Profile no. = FF EOT CRC

01h 20h 56h

3Fh 3Fh

04h 16h

Example 2: Transmit new profile (new profile number = 17)

Transmission

Response

SOH Adr Cmd Profile no. = 17 EOT CRC

01h 20h 56h

SOH Adr Cmd Profile no. = 17 EOT CRC

01h 20h 56h

31h 37h

31h 37h

04h 3E

04h 3E

Example 3: Transmit new profile by broadcast command to all N 140 (Identifier = 99 (83h); new profile no. =

17)

Transmission

Response Not confirmed

SOH Adr Cmd Profile no. = 17 EOT CRC

01h 83h 56h

31h 37h

04h 04

To check whether the new profile has been accepted by all N140 utilize check command „C“ (43h).

4.2.5. Read / write parameter offset, command „U“ (55h)

This command is to read or write the offset that is added to the true current value. First however the function
must be enabled in command bit parameter ‚a’ (61h).

Example 1: Read offset

Transmission

Example 2: Write offset

Transmission

Response in both examples:

Response

SOH Adr Cmd EOT CRC

01h 20h 55h 04h 26h

SOH Adr Cmd data (offset = –20,00) EOT CRC

01h 20h 55h

SOH Adr Cmd data (offset = –20,00) EOT CRC

01h 20h 55h

2Dh 30h 32h 30h 30h 30h

2Dh 30h 32h 30h 30h 30h

04h C3h

04h C3h

4.2.6. Align current value with preset, command „Z“ (5Ah)

The Z command is for setting the current value to any optional position. The required position value is
transmitted to the SPA. The SPA will calculate a so-called “preset offset” -value relating to the true absolute
sensor position. When calculating the preset offset any programmed offset transmitted by command “U” will be
considered, so that after having accomplished the “Z” command the current value always equals the preset.

The current value displayed is composed as follows:

Current value

Current value
Current value

current value displayed and read out by interface

Anz

internal absolute current value.

Abs

Preset offset Offset generated by command „Z“.
Offset Additional offset defined by command „U“. This function however must be enabled in

command bit parameter ‚a’ (61h), otherwise offset = 0.

Example 1: Readout current preset

Transmission

Response

SOH Adr Cmd EOT CRC

01h 20h 5Ah 04h 38h

SOH Adr Cmd Preset = 2,50 EOT CRC

01h 20h 5Ah

30h 30h 30h 32h 35h 30h

= current value

Anz

+ Preset offset + Offset

Abs

04h 27h

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Example 2: Align actual value with preset (preset = 17,25)

Transmission

Response

SOH Adr Cmd Preset = 17,25 EOT CRC

01h 20h 5Ah

SOH Adr Cmd Preset = 17,25 EOT CRC

01h 20h 5Ah

30h 30h 31h 37h 32h 35h

30h 30h 31h 37h 32h 35h

04h 09h

04h 09h

Example 3: Align actual value with preset at all SPAs by broadcast command

Transmission

Response Not confirmed

SOH Adr Cmd Preset = 17,25 EOT CRC

01h 83h 5Ah

30h 30h 31h 37h 32h 35h

04h AAh

4.2.7. Readout any optional number sequence in the upper line of display,
command „t“ (74h)

This command is to indicate a 6-digit number sequence in the upper line of the display. The sequence is
indicated without dot respectively comma. Preceding zeroes as well as both direction arrows are suppressed.
The bottom line still indicates the current value.
The number is shown on the display until any command except „t“, „u“ or „R“ is received by interface. The
number will be retained after power failure.

Example: (number sequence = 654321)

Transmission

Response

SOH Adr Cmd Number sequence = 654321 EOT CRC

01h 20h 74h

SOH Adr Cmd Number sequence = 654321 EOT CRC

01h 20h 74h

36h 35h 34h 33h 32h 31h

36h 35h 34h 33h 32h 31h

04h 47h

04h 47h

4.2.8. Readout any optional number sequence in the bottom line of display,
command „u“ (75h)

The command is for indicating a 6-digit number in the bottom line of the display. The number is indicated
without dot respectively comma. Preceding zeroes as well as both direction arrows are suppressed. The upper
line still indicates the current target or tool number.
The number sequence is displayed until any optional command except „t“, „u“ or „R“ is received by the interface.
The number will be retained after power failure.

Example: (number sequence = 123456)

Transmission

Response

Important:

Command “t” in conjunction with command “u” enables displaying a 12-digit number.
Tool number and number sequence are not saved.

SOH Adr Cmd Number sequence = 123456 EOT CRC

01h 20h 75h

SOH Adr Cmd Tool number = 123456 EOT CRC

01h 20h 75h

31h 32h 33h 34h 35h 36h

31h 32h 33h 34h 35h 36h

04h BCh

04h BCh

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4.3. Parameter commands

Command

code

Data amount

in bytes

read write Broad-

cast

Save in

EEPROM

Significance

a (61h) 5 X X - X Read / write general parameters
b (62h) 8 X X - X Parameter: Tolerance compensation, window
c (63h) 8 X X - X Parameter: Scaling spindle pitch

i (69h) 1 X X X X Parameter: mm / inch

x (78h) 5 X X - X Read / write specific parameters

4.3.1. Read / write bit parameter, command „a“ (61h)

To exploit maximum memory capacity, several parameters are put together and transferred as “data pack”
under the following parameter codes:

Data1: 1 0 X X 0 X 0 X
┬ ──┬── ─┬─ ─┬─
│ │ │ └─── positioning direction 0/1 (UP/DOWN)
│ │ └─────── counting direction 0/1 (UP/DOWN)
│ └──────────── arrows 0/1/2/3 (UP/DOWN/UNI/OFF)
└──────────────── 1

Data2: 1 0 X X X X 0 X
┬ ┬ ─┬─ ┬ ┬ ─┬─
│ │ │ │ │ └─── round current value 0/1 (OFF/ON)
│ │ │ │ └────── turn display 0/1 (OFF/ON)
│ │ │ └──────── dimension 0/1 (OFF/ON)
│ │ └─────────── offset 0/1 (OFF/ON)
│ └────────────── reserved
└──────────────── 1

Data3: 1 0 0 0 0 0 X X
┬
│ │ └─── hide target 0/1/2 (ON/OFF/EVER)
│ └────────── reserved
└──────────────── 1

Data4/5: 0 0 1 1 X X X X
───┬───
└───── reserved

Note: Only the bits marked ‘X’ may be altered. The permanent parameters „1“ and „0“ must not be altered since
this might create a control token ( tokens < 20h) what is not permitted in ASCII protocol.

Example 1: Read bit parameter (Data1 to Data3 = 80h; Data4 to Data5 = 30h)

Transmission

Response

Example 2: Write bit parameter (positioning direction = down; turn display = On)

Transmission

Response

────┬──── ─┬─

SOH Adr Cmd EOT CRC

01h 20h 61h 04h 4E

SOH Adr Cmd Data1 Data2 Data3 Data4 Data5 EOT CRC

01h 20h 61h

SOH Adr Cmd Data1 Data2 Data3 Data4 Data5 EOT CRC

01h 20h 61h

SOH Adr Cmd Data1 Data2 Data3 Data4 Data5 EOT CRC

01h 20h 61h

80h 80h 80h 30h 30h

81h 84h 80h 30h 30h

81h 84h 80h 30h 30h

04h F1

04h 91h

04h 91h

Bit parameter default

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4.3.2. Read /write parameter spindle tolerance and tolerance window,
command „b“ (62h)

This command is to read or write the parameters tolerance compensation and tolerance window.

Example 1: Read parameter (tolerance compensation = 0,15; tolerance window = 0,25)

Transmission

Response

SOH Adr Cmd EOT CRC

01h 20h 62h 04h 48h

SOH Adr Cmd Tolerance compensation=0,15 Tolerance window=0,25 EOT CRC

01h 20h 62h

30h 30h 31h 35h 30h 30h 32h 35h

04h AAh

Example 2: Write parameter (tolerance compensation = 1,30; tolerance window = 5,00)

Transmission

Response

SOH Adr Cmd Tolerance compensation=1,30 Tolerance window=5,00 EOT CRC

01h 20h 62h

30h 31h 33h 30h 30h 35h 30h 30h

04h 20h

SOH Adr Cmd Tolerance compensation=1,30 Tolerance window=5,00 EOT CRC

01h 20h 62h

30h 31h 33h 30h 30h 35h 30h 30h

04h 20h

4.3.3. Read / write parameter spindle pitch (scaling factor), command „c“ (63h)

This command is utilized to read or write the scaling factor of the spindle pitch within the range from
0,0000001...9,9999999. The decimal point is not transmitted.

How to calculate the scaling factor:

Resolution per turn: 23,04 mm
Spindle pitch: 4,00 mm

Resolution per turn 23,04

Example 1: Read scaling factor (scaling factor = 1,000000)

Transmission

Example 2: Write scaling factor (scaling factor = 0,1736111)

Transmission

Spindle pitch 4,00
Scaling factor = ───────────────── = ───── = 0,1736111

SOH Adr Cmd EOT CRC

01h 20h 63h 04h 4Ah

Response

Response

SOH Adr Cmd scaling = 1,0000000 EOT CRC

01h 20h 63h

31h 30h 30h 30h 30h 30h 30h 30h

SOH Adr Cmd scaling = 0,1736111 EOT CRC

01h 20h 63h

30h 31h 37h 33h 36h 31h 31h 31h

SOH Adr Cmd scaling = 0,1736111 EOT CRC

01h 20h 63h

30h 31h 37h 33h 36h 31h 31h 31h

04h 4B

04h 05h

04h 05h

N 140

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4.3.4. Read / write parameter measuring unit, command „i“ (69h)

The command is to read or write the measuring unit in mm or inches.

Data = 0 (30h) = mm
Data = 1 (31h) = inch

Example 1: Read parameter (parameter = mm)

Transmission

Response

SOH Adr Cmd EOT CRC

01h 20h 69h 04h 5E

SOH Adr Cmd Data EOT CRC

01h 20h 69h

30h

04h D0h

Example 2: Change measuring unit to inches

Transmission

Response

SOH Adr Cmd Data EOT CRC

01h 20h 69h

SOH Adr Cmd Data EOT CRC

01h 20h 69h

31h

31h

04h D2

04h D2

Example 3: Write mm as measuring unit into all N 140 by broadcast command (identifier/address=99)

Transmission

Response Not confirmed

SOH Adr Cmd Data EOT CRC

01h 83h 69h

30h

04h CDh

Important: Parameters are entered in mm and converted into inches by the SPA when displaying the position
values.

4.3.5. Read and write specific parameter „x“ (78h)

The specific parameter „x“ comprises several sub-parameters enabling alteration of originally permanent
parameters to adapt them to new circumstances. At present, the following sub-parameter is available:

D (44h) = minimized delay time of serial interface

Sub parameter: Delay time „D“ (44h)

This parameter defines the minimum delay time (timeout) between the last bit received and the first bit of the
response transmitted. Delay time is in steps of 0.1 ms within the range from 00.0...60.0 ms. Default is 1.0 ms.

Example 1: Read current delay time

Transmission

Response

Example 2: Write new delay time

Transmission

Response

Please note that the true delay time might be extended. It depends on the required processing time as well as
on internal software cycles. The tolerance is approx. 8 ms.

SOH Adr Cmd Sub EOT CRC

01h 20h 78h 44h 04h 7Ch

SOH Adr Cmd Sub Delay time = 4.5 EOT CRC

01h 20h 78h 44h

SOH Adr Cmd Sub Delay time = 15.0 EOT CRC

01h 20h 78h 44h

SOH Adr Cmd Sub Delay time = 15.0 EOT CRC

01h 20h 78h 44h

30h 30h 34h 35h

30h 31h 35h 30h

30h 31h 35h 30h

04h BBh

04h BDh

04h BDh

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4.4. Identifier commands

Command

code

Data amount

in bytes

read write Broad-

cast

Save in

EEPROM

Significance

A (41h) 2 X X X X Assign or indicate device identifier
B (42h) 2 - - - - SPA confirmation in addressing mode

4.4.1. Assigning device identifiers in the network, command „A“ (41h)

This command is creating an automated process where the device identifier is assigned in successive order to
every single SPA upon commissioning of the system. The first identifier to be assigned is broadcasted to all
networked SPAs as follows:

Transmission

SOH Adr Cmd identifier=01 EOT CRC

01h 83h 41h

30h 31h

04h B4h

All SPAs now show the identifier just transmitted and that is to be assigned in the upper line of the display. The
bottom line indicates the device-specific identifier. To enter the new identifier, the shaft of the respective SPA
has to be turned by half at least (direction does not matter). The identifier is now entered and appears in the
bottom line of the display (as device-specific identifier). Both identifiers are now identical. As soon as the shaft is
in idle position again and after having elapsed 3 seconds, the SPA will transmit to master the following
confirmatory command „B“ (42h):

Transmission

To Master

SOH Adr Cmd identifier=01 EOT CRC

01h 21h 42h

30h 31h

04h 86h

The Master may now transmits command „A“ with the next identifier to be assigned as previously described.
This way, the respective (successive) identifiers are automatically assigned to all networked SPAs, one after the
other.

Important: The confirmatory command „B“ transmitted by N 140 to master will be repeated after 3 seconds
provided the master has not previously transmitted another „A“ command.

4.4.2. Show identifier in the display, command „A“ (41h)

This command less parameters as a broadcast command (address/Identifier=99) will make every networked N
140 indicate the device-specific identifier in the bottom line of the display. The upper line is blind.
This command is a designated broadcast command.

Transmission

Response Not confirmed

SOH Adr Cmd EOT CRC

01h 83h 41h 04h 80h

The SPA remains in this mode until being switched off and on again or until transmission of another command.

4.4.3. Extended identifier command „AX“ (41h,58h)

This extended command is utilized for addressing individual multicon devices in the bus network in a similar
way as described above. By broadcast command the identifier to be assigned is transmitted to all networked
devices as follows:

Transmission

Response Not confirmed

Similar to the standard command all devices now show the identifier just transmitted and that is to be assigned
in the upper line. To enter the identifier proceed the same way. However contrary to the above no confirmatory
command „B“ will be replied. It is up to master to check whether the new identifier has been accepted, for
example by command “R” (read current value). The R-command is transmitted under the corresponding
identifier to the position display. If the addressed SPA is responding the assignment was successful and the
master can proceed with next identifier. Regarding other commands the display of the respective device
switches to standard operation.

SOH Adr Cmd Sub Identifier = 01 EOT CRC

01h 83h 41h 58h

30h 31h

04h 40h

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N 140

4.5. Specific commands

Command

code

Data amount

in bytes

read write Broad-

cast

Save in

EEPROM

Significance

K (4Bh) - - X X X Specific command: Profile reset (delete)
Q (51h) 1 - X X X Specific command: N 140 reset
X (58h) 2 / 4 / 8 X - - - Specific command: Read device data

4.5.1. SPA profile reset, command „K“ (4Bh)

This command is clearing all previously programmed profiles.

Example 1: Profile reset of a specific N 140

Transmisison

Response

SOH Adr Cmd Data EOT CRC

01h 20h 4Bh

SOH Adr Data EOT CRC

01h 20h

6Fh

04h C6h

7Fh

04h 52h N 140 replies by standard response ‚o’ (6Fh) = OK

Example 2: General profile reset at all N 140 by broadcast command (identifier = 99)

Transmission

Response Not confirmed

SOH Adr Cmd Data EOT CRC

01h 83h 4Bh

7Fh

04h DBh

Important: After profile reset all profile data are set to auf FFFFFFhex , the current profile number to FFhex.
The display now shows 6 dashes instead of the target.

4.5.2. N 140 restore default, command „Q“ (51h)

This command restores default either of individual or collective parameters.

Data = q (71h) = Restore default
Data = r (72h) = Controller reset
Data = t (74h) = Device identifier = 0.
Data = x (78h) = Multiturn counter is set to 4096 corresponding to 0.
Data = ∆ (7Fh) = All above functions except „r“ (72h) are enabled.
Parameter function „r“ is only enabled individually.

Note: No profile reset. Profile reset by command „R“.

Example 1: Restore default of specific N 140

Transmisison

Response

Example 2: Restore default at all N 140 by broadcast command (identifier=99)

Transmision

Response Not confirmed

SOH Adr Cmd Data EOT CRC

01h 20h 51h

SOH Adr Data EOT CRC

01h 20h

SOH Adr Cmd Data EOT CRC

01h 83h 51h

6Fh

04h AEh

7Fh

04h 52h N 140 replies by standard response ‚o’ (6Fh) = OK

04h B3

7Fh

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N 140

4.5.3. Read version, device type or serial number, command „X“ (58h)

This command is for reading version number, device type or serial number. The following sub-commands are
available:

Data = V (56h) = read version
Data = T (54h) = read device type
Data = S (53h) = read serial number

Example 1: Read version

Transmission

Response

Example 2: Read device type (device type = 80h = N 140; software no. = 01)

Transmission

Response

Code configuration of the transmitted device type:

1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 = 80 81 hex

┬ ──────┬────── ┬ ───────┬─────
│ │ │ └─────── software 01h = software no. 01
│ │ └──────────────── permanent 1
│ └────────────────────────── device type 00h = N 140
└────────────────────────────────── permanent 1

Example 3: Read serial number

Transmit

Response

Code configuration of the transmitted serial number:

The Low-Nibble (lower 4 bits of a byte) of the 8 data bits received equal together a 4 byte value comprising the
serial number.
The serial number is composed by date and time of production. Due to also the seconds being coded and by
assigning only one number per second the serial number is unique.

Example: Serial number for June 1st, 2005 / 01.06.2005 16:58:36 = 15 83 0E A4 hex

X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X Bit position
J J J J J J M M M M T T T T T h h h h h m m m m m m s s s s s s content
0 0 0 1 0 1 0 1 1 0 0 0 0 0 1 1 0 0 0 0 1 1 1 0 1 0 1 0 0 1 0 0 Ex.= 15 83 0E A4 hex

─────┬───── ────┬──── ────┬──── ─────┬───── ──────┬────── ─────┬─────
│ │ │ │ │ └─────── sec.10
│ │ │ │ └──────────────────── min.11
│ │ │ └──────────────────────────────── hours 1
│ │ └──────────────────────────────────────────── day
│ └────────────────────────────────────────────────────── month
└───────────────────────────────────────────────────────────────── year 0

01.06.05 16:58:36 <──────┘

SOH Adr Cmd Data EOT CRC

01h 20h 58h

56h

04h D8h

SOH Adr Cmd Data Version number = 3.00 EOT CRC

01h 20h 58h 56h

20h 33h 30h 30h

04h FAh

SOH Adr Cmd Data EOT CRC

01h 20h 58h

54h

04h DCh

SOH Adr Cmd Data Typ EOT CRC

01h 20h 58h 54h

80h 81h

04h 66h

SOH Adr Cmd Data EOT CRC

01h 20h 58h

53h

04h D2h

SOH Adr Cmd Data serial number code = 07090EA4 EOT CRC

01h 20h 58h 53h

30h 37h 30h 39h 30h 3Eh 3Ah 34h

04h 20h

0100 = 24h = 36d
1010 = 3Ah = 58d

0000= 10h = 16d

0001 = 01h = 01d

0110 = 06h = 06d
0101 = 05h = 05d

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N 140

5. Error warnings

5.1. CRC error

Upon recognizing a CRC error in a transmitted command the SPA will respond as follows:

Response

SOH Adr Error EOT CRC

01h 20h 65h 04h 46h Error = „e“ (65h) = CRC error

5.2. Format error

Upon recognizing a format error (incorrect length of protocol or void command (Cmd) in a transmitted command
the SPA will respond as follows:

Response

SOH Adr Error EOT CRC

01h 20h 66h 04h 40h Error = „f“ (66h) = Format error

6. Overview on commands

The following chart shows in alphabetical order all available commands (Cmd) as well as options regarding read
and write (parameterization).

Command

code

a (61h) 5 X X - X Read / write general parameters
b (62h) 8 X X - X Parameter: tolerance compensation, window
c (63h) 8 X X - X Parameter: scaling factor spindle pitch

i (69h) 1 X X X X Parameter: mm / inch

t (74h) 6 - X - - Transmit tool number
u (75h) 6 - X - - Transmit optional number sequence
x (78h) 5 X X - X Read / write specific parameters

A (41h) 2 X X X X Assign or show device identifier
C (43h) 3 / 11 X - - - Check if actual value = target
K (4Bh) - - X X X Specific command: Profile reset (delete)
Q (51h) 1 - X X X Specific command: N 140 reset
R (52h) 6 X - - - Read current value
S (53h) 8 X X - X Read/write target value
U (55h) 6 X X - - Offset
V (56h) 2 X X X X Read / write profile number
X (58h) 2 / 4 / 8 X - - - Specific command: read device data
Z (5Ah) 6 X X X X Set preset

Data amount

in bytes

read write Broad-

cast

Save in

EEPROM

Significance

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7. Technical data

Technical data – electrical ratings

Supply voltage 24 VDC ±10 %
Current consumption ≤30 mA
Display LCD, 7-segment display, 2-lines, backlit
Measuring principle Absolute multiturn sensing
Measuring range -999,99...+9999,99 mm

-99.999...+999.999 inch
Steps per turn 2304
Number of turns 4096 / 12 bit
Spindle pitch ≤23 mm
Interface RS485 (ASCII-protocol)
Data memory Parameter buffer: EEPROM
Current value buffer: >10 years by
integrated 3 V lithium battery
Programmable parameters Display position horizontal/vertical
Measuring unit mm/inch
Counting direction
Spindle pitch
Spindle tolerances
Positioning direction
Direction arrows
Tolerance window
Round up/down
Standard DIN EN 61010-1 Protection II
Overvoltage category II
Pollution degree 2
Emitted interference DIN EN 61000-6-3
Interference immunity DIN EN 61000-6-2
Approvals UL/cUL

Technical data – mechanical design

Hollow shaft ø20 mm, ø25 mm
Operating speed ≤600 rpm (short-term)
Protection DIN EN 60529 IP 65 (housing), IP 40 (connector)
Operating temperature -10...+50 °C
Storage temperature -20...+70 °C
Relative humidity 80 % not condensing
Torque support Torque pin provided at housing
E-connection - Cable output (30 cm) with male and mating connector M16, 5-pins
Housing type Surface-mount with hollow shaft
Dimensions W x H x L 56 x 100 x 62.5 mm
Mounting Surface-mount with hollow shaft
Weight approx. 200 g
Material Polycarbonate black, UL 94V-0

N 140

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7.1. Dimensions

25 H7

(20 H7)

58.5

Fixing pin
for bore

Ø

100

10 mm

40 ±0.2

37

Ø

Hollow shaft Ø25 mm

7

8

20°

M5

37

Ø

Hollow shaft

Ø

20 mm

N 140

M5

37

Ø

6

10

16

56

1

62.5

21.5

8. Part number

reference interface

1 RS485

connection

0 cable output with M16 connector
supply voltage

3 24 VDC

hollow shaft

A ø25 mm
B ø20 mm

N 140.1 0 3 A  01

4

8.5

M16-female
connector

M16
connector

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