Panasonic KR20 User Manual
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Contents
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1.3 Restrictions1.3.1 Communication restrictions for wired sideDelimiter time of data by wired sideWireless unit doesn’t determine an end of wired data by control code such as “CR”, and determineby a blank time.At initial setting, if there is the blank time for 10 characters, it is determined as the end of wireddata and wireless unit starts wireless communication. Therefore the data with blank more than thetime will be interrupted. Moreover, if the blank time between primary data and next data is lessthan the time, two data are judged as one datum, and it is not likely to send correctly.Connecting direction of master and slave(1:1 topology with repeaters, 1:N topology)Please let the master side as command sending side, and the slave side as response sending sidebecause it is a communication procedure for requiring the command response. Cannotcommunicate in inverse combination. And cannot use in communication system that both masterside and slave side sends the command.Sequences of command and responseWhen using sequence of sending successive command, make the sequence that it send the nextcommand after receiving a response to the former command. When timeout period is set, it isnecessary to consider wireless communication time. Wireless communication time may becomelong according to the surrounding communication environment, therefore there is a possibility thatcollision of command and response is occurred when it send the next command after a fixed timefrom the former command.Communication protocol for 1:N topologyRS232C or RS485 Primary Next dataDelimiter time of wired side(Initial 10 characters)Max 2048 byte Max 2048 byteCommandCommandResponseMasterComputerSlave TerminalResponseCommunication protocolnameRS485type I/O type Restrictions RemarksMEWTOCOL（Panasonic Electric Works Co., Ltd.） Available Available *1MODBUS ASCII Available －MODBUS RTU Available －GT Series Original（Panasonic Electric Works Co., Ltd.） Available － Cannot transferthe screenMessage Runner Original（Panasonic Electric Works Co., Ltd.） Available －・Data that is sent atonce don’t exceed2048byte・It is possible toextend the timeoutperiod Cannot transferthe screen*1:Now, it is not assured to operate by using PLC software.*2:For other than the above communication protocol, please use as 1:1 topology or 1:1 topologywith repeater.1-9Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: info@ctiautomation.net |
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