Pilz PSSu K S RS232 Modbus ASCII User manual

PSSu K S RS232 Modbus ASCII
Operating Manual 1001689-EN-05
}Decentralised system PSSuniversal I/O

Preface
This document is a translation of the original document.
All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for internal purposes. Suggestions and comments for improving this documentation will be
gratefully received.
Source code from third-party manufacturers or open source software has been used for
some components. The relevant licence information is available on the Internet on the Pilz
homepage.
Pilz®, PIT®, PMI®, PNOZ®, Primo®, PSEN®, PSS®, PVIS®, SafetyBUS p®,
SafetyEYE®, SafetyNET p®, the spirit of safety® are registered and protected trademarks
of Pilz GmbH & Co. KG in some countries.
SD means Secure Digital

Contents
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Section 1 Introduction 5
1.1 Validity of documentation 5
1.1.1 Retaining the documentation 5
1.1.2 Terminology: System environment A and B 5
1.2 Definition of symbols 6
Section 2 Overview 7
2.1 Module structure 7
2.2 Module features 7
2.3 Front view 8
Section 3 Safety 9
3.1 Intended use 9
3.2 Safety regulations 9
3.2.1 Use of qualified personnel 9
3.2.2 Warranty and liability 10
3.2.3 Disposal 10
Section 4 Function description 11
4.1 Block diagram 11
4.2 Module features 11
4.2.1 Function description 11
4.2.2 Integrated protection mechanisms 12
4.3 Data exchange 12
4.4 Configuration 12
4.4.1 Interface parameters 12
4.4.2 Receive buffer threshold 13
Section 5 Installation 14
5.1 General installation guidelines 14
5.1.1 Dimensions 14
5.2 Install compact module 15
Section 6 Wiring 17
6.1 Interface configuration 17
6.1.1 RS232 interface 17
Section 7 Operation 18
7.1 Messages 18
7.2 Display elements 18
7.2.1 Display element for operational readiness 18
7.2.2 Display element for module error 19
7.2.3 Display elements for data transmission 19

Contents
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Section 8 Technical details 20
Section 9 Order reference 22
9.1 Product 22
9.2 Accessories 22

Introduction
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1 Introduction
1.1 Validity of documentation
This documentation is valid for the product PSSu K S RS232 Modbus ASCII. It is valid until
new documentation is published.
This operating manual explains the function and operation, describes the installation and
provides guidelines on how to connect the product.
1.1.1 Retaining the documentation
This documentation is intended for instruction and should be retained for future reference.
1.1.2 Terminology: System environment A and B
The PSSu system can be used in two different system environments. The module's applic-
ation area is described in the chapter "Intended Use" of the manual.
The distinction is made between
}PSSu in system environment A
}PSSu in system environment B
The distinction is based on the application area of the PSSu system.
PSSu in system environment A may be used in the
}Decentralised system PSSu I/O
}Not in the automation system PSS 4000
PSSu in system environment B may be used in the
}Automation system PSS 4000, e.g. with
– Decentralised system PSSu I/O with SafetyNET p
– Control system PSSu PLC
– Control system PSSu multi
The module PSSu K S RS232 Modbus ASCII is exclusively for use in system environment
B (automation system PSS 4000).

Introduction
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1.2 Definition of symbols
Information that is particularly important is identified as follows:
DANGER!
This warning must be heeded! It warns of a hazardous situation that poses
an immediate threat of serious injury and death and indicates preventive
measures that can be taken.
WARNING!
This warning must be heeded! It warns of a hazardous situation that could
lead to serious injury and death and indicates preventive measures that can
be taken.
CAUTION!
This refers to a hazard that can lead to a less serious or minor injury plus
material damage, and also provides information on preventive measures
that can be taken.
NOTICE
This describes a situation in which the product or devices could be dam-
aged and also provides information on preventive measures that can be
taken. It also highlights areas within the text that are of particular import-
ance.
INFORMATION
This gives advice on applications and provides information on special fea-
tures.

Overview
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2 Overview
2.1 Module structure
The module combines the function unit (inputs or outputs, interfaces) and connection levels
in one housing.
Wiring is via Sub-D female and male connectors
2.2 Module features
The product has the following features:
}Serial interface: RS 232
}Communication channels: 2 (Tx/Rx, full duplex)
}Configurable transmission rates
}Receive buffer: 1023 Byte
}Send buffer: 127 Byte
}Max. number per system: 6
}Data exchange based on the Modbus ASCII protocol
}LEDs for:
– Operational readiness
– Module error
– Data transmission
}For standard applications in system environment B (automation system PSS 4000)

Overview
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2.3 Front view
RS232
Modbus
ASCII
PSSu K S RS232
Modbus ASCII
1
2
3
4
Key:
}1: Labelling strip with:
– 2D code
– Order Number
– Serial Number
– Hardware version number
}2: Name of compact module
}3: D-Sub connector (male) X1
}4: LEDs for status display and module diagnostics

Safety
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3 Safety
3.1 Intended use
The module provides a serial interface. It is designed for communication in non-safety-re-
lated applications in system environment B (automation system PSS 4000).
Intended use includes making the electrical installation EMC-compliant. Please refer to the
guidelines stated in the "PSSuniversal Installation Manual". The module is designed for use
in an industrial environment. It is not suitable for use in a domestic environment, as this can
lead to interference.
The following is deemed improper use in particular:
}Any component, technical or electrical modification to the module
}Use of the module outside the areas described in this manual
}Any use of the module that is not in accordance with the technical details.
INFORMATION
The module is supported by PAS4000 from version 1.0.0. We recommend
that you always use the latest version (download from www.pilz.de).
3.2 Safety regulations
3.2.1 Use of qualified personnel
The products may only be assembled, installed, programmed, commissioned, operated,
maintained and decommissioned by competent persons.
A competent person is someone who, because of their training, experience and current pro-
fessional activity, has the specialist knowledge required to test, assess and operate the
work equipment, devices, systems, plant and machinery in accordance with the general
standards and guidelines for safety technology.
It is the company’s responsibility only to employ personnel who:
}Are familiar with the basic regulations concerning health and safety / accident preven-
tion
}Have read and understood the information provided in this description under "Safety"
}And have a good knowledge of the generic and specialist standards applicable to the
specific application.

Safety
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3.2.2 Warranty and liability
All claims to warranty and liability will be rendered invalid if
}The product was used contrary to the purpose for which it is intended
}Damage can be attributed to not having followed the guidelines in the manual
}Operating personnel are not suitably qualified
}Any type of modification has been made (e.g. exchanging components on the PCB
boards, soldering work etc.).
3.2.3 Disposal
}In safety-related applications, please comply with the mission time TM in the safety-re-
lated characteristic data.
}When decommissioning, please comply with local regulations regarding the disposal of
electronic devices (e.g. Electrical and Electronic Equipment Act).

Function description
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4 Function description
4.1 Block diagram
Module Bus
Periphery
Supply
+ 24 V DC
Module
Supply
+ 5 V DC
Data
(ST)
RS232
13 23
(C-Rail)
11 12 21 22 14 24
4.2 Module features
4.2.1 Function description
The module enables communication via a serial interface.
Module supply
}The module supply provides the module with voltage.
Periphery supply
}The periphery supply provides the serial interface with voltage.
Signal processing
}In each cycle, a max. of 8 Bytes of data can be transferred in both directions between
control system and module. The data to be transferred is stored temporarily in a send
and receive buffer.
}Two additional status bytes and control bytes are available in the process image for
data exchange between control system and module.
}All the configuration data is stored in the head module and is assigned to the module on
restart. This way the configuration data is retained even if you change the module.

Function description
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Schematic representation of signal processing with the control system PSSu PLC/PSSu
multi:
Ext. device
with serial
interface
RS232
PSSu K S RS232
Modbus ASCII
Head
module
with
control
system
Module
bus
4.2.2 Integrated protection mechanisms
When the PSSuEFPS1(-T) or PSSu E F PS2(-T)(-R) is used to supply the system, the
module supply is buffered for 20ms if the supply voltage is interrupted.
The module detects the following errors:
}Start-up error
}Configuration error
}ST communication error
}Bus termination error
4.3 Data exchange
Data is exchanged between subscribers via a special protocol based on the Modbus ASCII
protocol.
INFORMATION
The necessary function block is available from Technical Support (tele-
phone: [phone]).
4.4 Configuration
The module has the following configuration options:
}Interface parameter
}Threshold receive buffer
4.4.1 Interface parameters
The following interface parameters can be configured:
}Transmission rate
}Xon/Xoff when sending
}Xon/Xoff when receiving
}RTS and CTS enabled

Function description
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4.4.2 Receive buffer threshold
The number of Bytes in a receive buffer of the module is defined with this value, from which
the status bit "Receive buffer full" is set (default value: 512).

Installation
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5 Installation
5.1 General installation guidelines
Please refer also to the PSSuniversal Installation Manual.
NOTICE
Damage due to electrostatic discharge!
Electrostatic discharge can damage components. Ensure against discharge
before touching the product, e.g. by touching an earthed, conductive sur-
face or by wearing an earthed armband.
5.1.1 Dimensions
Schematic representation:
49,2 mm
128,9 mm
5,07"
1,94"
30 mm
1,18"

Installation
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5.2 Install compact module
Prerequisite:
}The head module must be installed.
}If the head module does not have an integrated power supply, a supply voltage module
must be installed to the right of the head module.
}A base module with screw terminals may not be installed to the left of the compact
module.
Please note:
}All contacts should be protected from contamination.
}The mechanics of the compact modules are designed for 50 plug in/out cycles.
Procedure:
}Slot the groove on the compact module on to the mounting rail from below [1].
}Push the compact module back as far as it will go [2].
}Make sure that the locking mechanism [3] is pushed downwards, connecting the mod-
ule firmly to the mounting rail.
}On the mounting rail, slide the compact module to the left.
NOTICE
Potential contact damage due to twisting!
The contacts for the Module Supply and Periphery Supply can be bent by
twisting the compact modules on the mounting rail.
– On the mounting rail, carefully slide the compact module to the left, in
parallel to the adjoining module, until you hear the lateral mounting
hooks on the adjacent module lock into position [4].

Installation
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Schematic representation:
[1]
[3]
[4]
[2]
[4]

Wiring
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6 Wiring
6.1 Interface configuration
6.1.1 RS232 interface
RS232 Assignment X1
D-Sub male connector 1: n.c.
2: Input Rx (receive data)
3: Output Tx (send data)
4: n.c.
5: GND
6: n.c.
7: Output RTS
8: Input CTS
9: n.c.
1
5
6
9
n.c. = not connected

Operation
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7 Operation
7.1 Messages
A module error is displayed via the "Err" LED, signalled to the head module and then
entered in the head module's diagnostic log.
The module can detect the following errors:
Errors Statement Remedy
Start-up error Error as the PSSu system starts
up
Change faulty module.
Configuration error Wrong module type selected or in-
valid module configuration
Adjust the configured hardware re-
gistry to the actual hardware re-
gistry so that they match, or cor-
rect the module configuration.
ST communication error Error during ST communication Change faulty module
Bus termination error There is no terminating plate or
there is a bad contact with the
module bus.
Install a terminating plate with in-
tegrated end bracket or insert the
base modules together correctly.
7.2 Display elements
Legend
LED on
LED off
7.2.1 Display element for operational readiness
The module has an LED for displaying that the system is ready for operation (LED "Run").
Run
Run
LED Key
Description Colour Status
Run - - - Module not
ready for oper-
ation
green Module ready
for operation

Operation
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7.2.2 Display element for module error
The module has an LED for displaying module errors ("Err" LED).
Err Err
LED Meaning
Designation Colour Status
Err - - - No error
Red Module is
faulty
7.2.3 Display elements for data transmission
The module has the LEDs Tx and Rx for displaying the data transfer (LEDs "Tx" and "Rx").
Rx
Tx Tx Rx
LED Key
Descrip-
tion
Colour Status Signal Pin
Tx - - - No data
transfer
2
green Send
data
Rx - - - No data
transfer
3
green Receive
data

Technical details
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8 Technical details
General
Approvals CE, cULus Listed
Application range Standard
Module's device code 0720h
Number of ST input bits 64
Number of ST output bits 64
Number of ST status bits 16
Number of ST control bits 16
Application in system environment B
From ST firmware version, head modules 1.0.0
Electrical data
Internal supply voltage (module supply)
Module's power consumption 0,63 W
Periphery's supply voltage (periphery supply)
Voltage range 16,8 - 30,0 V
Module's current consumption with no load 20 mA
Module's power consumption with no load 0,48 W
Max. power dissipation of module 1,20 W
Serial interface
Number of RS232 interfaces 1
Transmission rate (configurable) 1,2 kBit/s, 19,2 kBit/s, 2,4 kBit/s, 300 Bit/s, 4,8
kBit/s, 600 Bit/s, 9,6 kBit/s
Max. cable length 15 m
Size of receive buffer 1.023 Byte
Size of send buffer 127 Byte
Potential isolation between interface and module sup-
ply yes
Potential isolation between interface and periphery
supply yes
Environmental data
Climatic suitability EN 60068-2-1, EN 60068-2-14, EN 60068-2-2, EN
60068-2-30, EN 60068-2-78
Ambient temperature
In accordance with the standard EN 60068-2-14
Temperature range 0 - 60 °C
Storage temperature
In accordance with the standard EN 60068-2-1/-2
Temperature range -25 - 70 °C
Climatic suitability
In accordance with the standard EN 60068-2-30, EN 60068-2-78
Humidity 93 % r. h. at 40 °C
Condensation during operation Not permitted
EMC EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN
61000-4-5, EN 61000-4-6, EN 61131-2