Parker IQAN-XA2 Instruction Book

12Addressing/terminatingInstruction book, IQANAddressing/terminatingAddressingEach IQAN expansion module will have a specific address, enabling the master moduleto communicate with the modules through the CAN-bus. When operating, the systemdistinguishes between different modules by first verifying the module type andsecondly, through the modules having unique addresses.The maximum number of similar modules in a system is four or eight depending on themaster module, denoted in the first case as addresses 0, 1, 2, 3 respectively. In order toassign any IQAN module a unique CAN-address, an ID-Tag will have to be connectedto the positions ADDR-H and ADDR-L.Connecting of Id-Tag.TerminatingTo eliminate interference in the communications through the CAN-bus, the CAN-busmust be terminated at both ends. By default, if no ID-tag is installed in an IQANmaster, it will be terminated internally to be the Bus master and will have no specialconfiguration.When an IQAN expansion module is located at the end of the CAN-bus, then youwould use an ID-tag having a combined addressing and terminating function. This isdenoted with a "T" for terminating, after the appropriate address such as; 0T, 1T, 2T...etc. In the application, the same address value as the non-terminated ID-Tag withequivalent number will be transferred to the application.Selecting appropriate ID-Tag• Check the address number of the module assigned in the application.• If the module is located at the end of the CAN-bus, then select the appropriate ID-Tag denoted with a "T".N OTICEThe CAN-bus must not be terminated at the module using an external regularterminating resistor, due to the fact that terminating is made from within the module bydefault or in conjunction with the ID-Tag.EXAMPLEIf having an expansion module with address 0, the system will denote this one as[module type]-A0, The letter "A" in the example refers to CAN-bus A.ID-TagADDR-LADDR-HIQAN module