Xylem CL500 ONLINE CHLORINE ANALYZERS MODBUS Manual do Utilizador

Global Water MODBUS MANUAL For the CL500 Online Residual Chlorine Monitor Global Water 11390 Amalgam Way Gold

4.3 Holding Registers These 16-bit values are readable and changeable from the master. The data is stored and transmitted with the MSB first and then

Address Type Register Min Default Max Function 2 -- Odd 40013 Int RS-485 stop bits 0 0 1 0 – One 1 -- Two 40014 Int Instrument address 1 1 255

4.4 Input Registers These 16-bit values are readable by the master. The data is stored with the MSB first and then the LSB. 4.4.1 Valid Command(s) Co

0x00000 Normal 0x00001 Break in the 4-20 mA current loop (MA) 0x00002 Calibration error (ZCAL) 0x00004 No intake water (WATR) 0x00008 Intake water

CL500 Modbus (3/09) Rev. 1.3 12Note: Error messages shown in Prentiss and in (Italics) 4.5 Exception Responses Implemented Code Name Meaning 00 --

1.0 Overview The Global Water CL500 uses a communication protocol called Modbus. A company called Modicon, for use with their programmable contro

2.0 Electrical Connections All of the electrical connections to the instrument are made at the termination area, which is located on the portion

2.1 RS-485 Connection The RS-485 half-duplex (2-wire) digital interface operates with differential levels that are not susceptible to electrical inte

3.0 Operation 3.1 Configuring the RS–485 Port The CL500 is equipped with an RS-485 port which operates in one of three ways (see the operator’s ma

3.1 Configuring the RS–485 Port (continued) For Modbus some applications, especially involving the ASCII operation mode, it may be necessary to set

4.0 The Modbus RS-485 Output & Commands Implemented The default communication parameters are 8 bits, no parity and 1 stop bit. Please note tha

4.2 Input Status These single-bit values are readable from the master. The data will be returned with the lowest addressed input status in the LSB of