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

N 140

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

5

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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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