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Montage- und Anschlussanleitung / PROFIBUS-Gateway für serielle Diagnose
Mounting and wiring instructions / PROFIBUS gateway for serial diagnostics
Instructions de montage et de câblage / Passerelle PROFIBUS pour diagnostic série
Initiation
english
The electronic safety sensors and solenoid interlocks must be wired
in accordance with their technical data. A series-wiring of the safety
channels and the diagnostic channels is set up.
The serial diagnostic cable is daisy-chained from one device to
another and connected to the PROFIBUS gateway. The SD terminal
of the PROFIBUS gateway is wired to the SD input of the first device
in the chain. The SD output of the first device is wired to the SD
input of the next device and so on. The output of the last device is
not wired and in no way may be connected to the operating voltage
or the GND.
The PROFIBUS gateway must be identified as PROFIBUS Slave
and integrated in the local PROFIBUS DP network. To this end, use
default PROFIBUS cables and connectors. Use the terminal resistors
in accordance with the specifications of the PROFIBUS network.
When the operating voltage of the PROFIBUS gateway is switched
on, the serial diagnostic of the connected safety devices is automati-
cally initialized. The SD device addresses of the series-wired safety
sensors are automatically defined. Up to 31 addresses are allocat-
ed. 1 is the address of the first device, starting from the PROFIBUS
gateway. For every further device in the chain, the address is incre-
mented with 1. Upon initialization, the device configuration is also
checked. For these applications, the PROFIBUS Gateway requires a
6-seconds delay time to readiness.
If a participant is removed from or added to the SD chain, the volt-
age supply of the PROFIBUS gateway and of all safety sensors
must be shut down.
When the PROFIBUS Gateway is switched back on, it detects the
modified configuration of the participants in the SD chain. The
Teach LED is blinking to signal this change; the new addressing
can be applied by actuating DIP switch 8.
Please note that the address range in the PLC also changes due
to the new assignment of the SD addresses.
Communication with downstream PLC controls
The PROFIBUS gateway acts as data collector, i.e. it gathers the
data and signals of the up to 31 connected electronic safety sen-
sors and solenoid interlocks with "serial diagnostic".
When the gateway is wired to the local PROFIBUS network, the
PROFIBUS network must be installed and the PLC system must be
configured.
PROFIBUS Request (OUTPUT byte control, transmission of the request data to the SD slave)
Service
Byte Nr.
SD device
Content
PROFIBUS Response (INPUT byte control, reception of the response data from the SD slave)
Service
Byte Nr.
SD device
Content
The content of the diagnostique byte of an SD slave depends on the status of the warning and the error bits in the corresponding response byte.
(Bit 6 = error warning and Bit 7 = error)
The meaning of the individual bits of the SD bytes is explained in the mounting instructions of the SD devices.
PKW
1.-4.Wort
Byte 00
---
Gateway
---
Instruction byte
PKW
1.-4.Wort
Byte 00
---
Gateway
---
Diagnostic byte
Byte 01
Byte 02
Gateway
Slave 01
SD address (0, 1-31) Request byte
Byte 01
Byte 02
Gateway
Slave 01
Data byte
Response byte
SD-I-DP-V0-2
The user manual of the PROFIBUS-Gateway SD-I-DP-V0-2 includes
a detailled description of the procedure.
The following items must be configured:
1. Configure the hardware of the PLC system
2. Insert and configure the DP Master
3. Install the corresponding GSD file
4. Integrate the DP Slave (PROFIBUS gateway) and configure the
number of SD slaves
The GSD file for the PROFIBUS-Gateway SD-I-DP-V0-2 is supplied
on CD or can be downloaded from the internet at www.schmersal.
com. This file must be installed in the local PLC system.
File name GSD file: KAS_0b13.GSD
The operational conditions of the connected safety sensors and
solenoid interlocks can be retrieved from the PLC with different
details.
1. SD Master diagnostique, SD system error
2. Status data of the SD slave
3. Diagnostique data of the SD slave
Short description of the PROFIBUS Data Exchange
The cyclic data exchange of the PROFIBUS DP consists of a
request (Request) and the corresponding response (Response).
The utilisation data of the SD slave are transferred to PROFIBUS
as process data (PZD). When the SD slave emits a request, these
process data include the control data; when the SD slave emits a
response, the process data include the status and diagnostique
data.
In the PZD response, first the response byte and then the
diagnostique byte of the SD slave concerned is transmitted.
The total volume of the byte in the PZD depends on the number
of projected SD slaves and is determined by selecting the number
of SD slaves from the GSD file.
Protocol structure of the SD data and SD diagnostique
data in the PZD
Every SD slave transmits 2 bytes: first the response byte and then
the diagnostique byte. The data from SD slave 01 are included in
PZD byte 02 and 03, the data from SD slave 02 in PZD byte 04 and
05 and so on. The data from SD slave 31 therefore are included
in PZD byte 62 and 63. PZD bytes 00 and 01 are used for the SD
system diagnostiques.
PZD
Byte 03
...
Slave 01
...
---
PZD
Byte 03
...
Slave 01
...
Diagnostic byte
7 / 16
Byte 62
Byte 63
Slave 31
Slave 31
Request byte
---
Byte 62
Byte 63
Slave 31
Slave 31
Response byte Diagnostic byte
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