ABB PLUTO Safety-PLC Operating Instructions Manual

Also see for PLUTO Safety-PLC: Startup guide

Contents

ABB PLUTO Safety-PLC Operating Instructions Manual Manual pdf 39 page image

39 2TLC172001M0211_A9 Pluto bus communicationUp to 32 Pluto units can be interconnected with CAN-bus. Communication is achieved byconnecting a twisted pair cable to the CH and CL terminals. When this connection is made thePluto units can read each other’s I/O.When the bus is connected each Pluto unit executes its own individual program and operatesindependently, however it can read other units I/O.An interruption of the bus connection results in the I/O in the unit with which communication islost, being regarded as a “0” condition by other units on the bus. In this situation all units willcontinue program execution with the consequences of the fault being dependent upon theapplication program. For instance, if an emergency stop button connected to one unit is usedby another unit as a condition for setting an output, the output will switch off if communicationsare lost. Outputs generated by I/O connected directly to a unit are not affected by interruptionof communications.9.1 Bus cablingThe maximum length of CAN-bus cabling is dependent on the transmission speed. At thedefault setting of 400 kbit/s the maximum total length is 150 meters. (This length can beextended by the use of Gateways as bridges. See Pluto Gateway Manual chapter 1 “General”and chapter 8 “CAN bridge mode”). At each end of the bus a termination resistor of 120 W mustbe installed. When a Pluto unit is working alone and no bus-cable is connected, it must still beequipped with a termination resistor.The bus connection should be made with a twisted pair cable to the CH and CL terminals.120 W 120 W120 WIQ12 IQ14 IQ16 Q0 Q1PLUTOKCLCHQ2I6 IQ10Q3IQ11I7I5I3I1C HI2C L I0 I4+24VID 0VIQ17IQ15IQ13IQ 12 IQ14 IQ16 Q0 Q1PLUTOKCLCHQ2I6 IQ10Q3IQ 11I7I5I3I1C HI2C L I0 I4+24VID 0VIQ17IQ15IQ 13IQ12 IQ14 IQ16 Q0 Q1PLUTOKCLCHQ2I6 IQ10Q3IQ11I7I5I3I1C HI2C L I0 I4+ 24VID 0VIQ17IQ15IQ13IQ12 IQ14 IQ16 Q0 Q1PLUTOKCLCHQ2I6 IQ10Q3IQ11I7I5I3I1C HI2C L I0 I4+24VID 0VIQ17IQ15IQ13IQ12 IQ14 IQ16 Q0 Q1PLUTOKCLCHQ2I6 IQ10Q3IQ11I7I5I3I1C HI2C L I0 I4+24VID 0VIQ 17IQ15IQ13IQ12 IQ14 IQ16 Q0 Q1PLUTOKCLCHQ2I6 IQ10Q 3IQ11I7I5I3I1C HI2C L I0 I4+24VID 0VIQ17IQ15IQ13StubConnection of CAN bus: CH to CH and CL to CL.A terminating resistor in each end of the bus. Stubs are restricted to certain max length and shall nothave terminating resistor.