Parker IQAN-MC31 Instruction Book

16Addressing/terminatingInstruction book, IQAN- MC31Addressing/terminatingIQAN-MC31 use of an ID-TagIn IQANdesign 3.0 and higher software, more than one IQAN master module can beused together in a multi-master system. The master modules are each given a uniqueaddress by using an ID-Tag. The value of the ID-Tag identifies the master and willenable a single project application to be loaded into more than one master module overthe CAN bus. The functionality needed for each master is loaded based on the ID-tagaddress.Identification of an IQAN-MC31 by addressFor normal operation of an IQAN-MC31 in a single master system, the ID-Tag is stillused. When no ID-Tag is installed the MC31 or if the ADDR pins are jumpered onpower up, the MC31 will start in safe mode.The connection of an ID-Tag between ADDR-H and ADDR-L will assign an address tothe IQAN-MC31 master module. The desired functionality based on address is builtinto the project file using IQANdesign software. For more information, please refer tothe IQANdesign user manual.It is the combination of address and type that gives each master module a uniqueidentification. The maximum number of MC31 addresses is 8, denoted as addresses 0,1, 2, 3, 4, 5, 6, 7 respectively.In order to assign any IQAN-MC31 an address , an ID-Tag will have to be connected tothe 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. By default, the MC31 is terminated internally on all of its CANbuses. When an IQANdesign application is loaded, it can set individual buses to benon-terminated.To give an IQAN-MC31 a unique address, you may use an addressing ID-tag, or an ID-tag having a combined address and terminating function. The ’T’ values of ID-tags areignored, i.e. an ID-tag 3T is equivalent to ID-tag 3.If the module is located at the end of the CAN-bus, then leave the bus defaultterminated in the MC31.N OTICEThe CAN-bus should not be terminated at the MC31 using an external regularterminating resistor, due to the fact that terminating is made from within the MC31module by default.ID-TagADDR-LADDR-HIQAN-MC31