IFM Electronic AC1155 Device Manual

Device manual
AS-i / RS-485 gateway
AC1155
UK
7391078/02 04/2016
RS-485 gateway
1 Preliminary note � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
2 Safety instructions � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
3 Documentation� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
4 Functions and features � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 3
4�1 Receiving data via the RS-485 gateway � � � � � � � � � � � � � � � � � � � � � � � � � � 4 4�2 Sending data via the RS-485 gateway � � � � � � � � � � � � � � � � � � � � � � � � � � � � 4
5 Manufacturer-specific device behaviour � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5
5�1 Status model (Root Device Profile) � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5 5�2 Status transition table� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 5
6 Acyclic CTT2 services� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
6�1 Standard services� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
6�1�1 Standard ID object � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
6�1�2 Standard diagnostic object� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7 6�2 Exchange device parameters� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8 6�3 Exchange serial data � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9 6�4 Data structures � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 10
2
RS-485 gateway

1 Preliminary note

This document applies to the device AC1155�
This document is intended for specialists� These specialists are people who are qualified by their appropriate training and their experience to see risks and to avoid possible hazards that may be caused during operation or maintenance of the device� The document contains information about the correct handling of the device�
Read this document before use to familiarise yourself with operating conditions, installation and operation� Keep this document during the entire duration of use of the device�
Adhere to the safety instructions�

2 Safety instructions

UK
These instructions contain texts and figures concerning the correct handling of the device and must be read before installation or use�
Observe the operating instructions� Non-observance of the instructions, operation which is not in accordance with use as prescribed below, wrong installation or incorrect handling can seriously affect the safety of operators and machinery�

3 Documentation

This documentation relates to the hardware and firmware status at the time of editing this manual�

4 Functions and features

The devices have been designed for use in applications described in this manual and the data sheet�
Adhere to the data indicated in the data sheets and in the manual� If the handling specifications and safety instructions for configuration, installation and operation indicated in the documentation are adhered to, the devices normally do not lead to any danger for persons and objects�
The AS-i / RS-485 gateway is a slave for the AS-Interface fieldbus system� It corresponds to the V3�0 specification and can be operated in the extended addressing mode�
AS-i profile S-B�A�5, the CTT2 communication protocol is implemented�
The AS-i / RS485 gateway is used to connect devices with an RS485 interface (text displays, code readers, measurement devices����) to AS-Interface�
3
RS-485 gateway
Parameter data is stored permanently in the slave memory� Since the
process of storing takes several 100 ms, the CTT2 communication will stop
and resume after a reset of the device only�

4.1 Receiving data via the RS-485 gateway

The slave cyclically transmits the number of bytes that have been received and that are available for reception via AS-Interface� The receive buffer in the slave has a size of 64 bytes�
The master should then send "18, 3, xx" (acyclic read service request to index 3 with a usable length of xx bytes) to collect the information�
If more than 32 bytes are in the buffer, the command may be issued several times with a maximum length of 32 bytes until the buffer is empty� If there are fewer bytes in the buffer than required, the response contains all available bytes� If an acyclic read service request to index 3 is issued while the buffer is empty, the response is an error "illegal length"�
If single bit transmission errors occur, AS-Interface will repeat faulty telegrams and recover lost information� If byte transmission errors occur, the data may be lost�

4.2 Sending data via the RS-485 gateway

The master sends "19, 3, xx, ��� data���" (acyclic write service request to index 3 with a usable length of xx bytes) to transmit the output information�
If more than 32 bytes are to be transmitted, this write service may be repeated several times with a maximum length of 32 bytes� Since the RS-485 interface is faster than AS-Interface, there is no danger of buffer overrun�
4
Loading...
+ 7 hidden pages