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Configurable remote input/output (IO) controller host

A controller and host technology, applied in the direction of electrical program control, comprehensive factory control, comprehensive factory control, etc., can solve problems such as no reports

Active Publication Date: 2012-03-21
SHANGHAI ELECTRICAL APP RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, through the analysis of existing related patents, it is found that there is no protocol converter that completes the conversion from CANOpen to Modbus protocol on the basis of the remote I / O module that supports the CANOpen communication interface, and there is no relevant report in this regard

Method used

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  • Configurable remote input/output (IO) controller host
  • Configurable remote input/output (IO) controller host
  • Configurable remote input/output (IO) controller host

Examples

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Embodiment Construction

[0018] Embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] In this embodiment, a configurable remote IO host supporting both CANOpen and Modbus field bus network communication belongs to the field of field bus industrial control. This embodiment includes: a main chip 1 , a UART interface 2 , a CANOpen bus interface 3 , an input circuit 4 , an output circuit 5 , an indicator light 6 , a power module 7 , and an expansion module interface 8 .

[0021] The main chip 1 adopts the processing chip with ARM7 core. The host body has 32 points of digital quantity, 18 points of input circuit 4, and 14 points of output circuit 5, and supports 8 expansion module interfaces 8. Multiple I / O pins are used to realize 32 digital input and output functions of the remote I / O host module; the SPI communication interfac...

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Abstract

The invention discloses a configurable remote input / output (IO) controller host, which comprises a power supply module, a main chip, an input circuit, an output circuit, an expansion module connecting circuit, an indicator light, a control area network (CAN) Open field bus interface and a Modbus series communication interface and is characterized by being made according to the following steps of:initiating the CANOpen interface after the configurable remote IO controller host is powered on; reading configuration of a Modbus by a controller and completing initialization; refreshing local I / O data; refreshing expansion module I / O data; judging whether the Modbus of a universal asynchronous receiver / transmitter (UART) port is in a main station mode; acquiring I / O data in a connected remote Modbus slave station if the Modbus is in the main station mode, buffering, packaging buffer data and forwarding the buffer data to a CANOpen network; and providing support for access of a remote Modbus main station to the I / O data of the local I / O controller host if the Modbus is in a slave station mode. The configurable remote IO controller host has the advantages that a configurable remote IO host which supports a communication function between the CANOpen and the Modbus fied bus slave station and simultaneously supports a protocol converter function of data transfer between the Modbus and the CANOpen is realized.

Description

technical field [0001] The invention relates to a remote industrial automation control device, which belongs to the field bus industrial control field, in particular to a configurable remote IO controller host. Background technique [0002] Today, remote IO has been widely used in automation control systems. With the widespread application of CAN (Control Area Network) fieldbus, there are more and more fieldbus products supporting CANOpen. Due to the longer application history of the Modbus communication protocol, there are still a large number of devices that only support the Modbus communication protocol. The Modbus communication protocol can be implemented on a serial communication link based on RS485 or RS232. Most of the current remote IO hosts only support a single slave communication protocol such as CANOpen, DeviceNet, Modbus, etc. When the equipment of the upper field bus CANOpen network in the control system needs to scan terminal equipment such as smart instrume...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 琚长江侯金华应成
Owner SHANGHAI ELECTRICAL APP RES INST
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