ABB module 086351-004 Power supply unit PLC module

ABB module 086351-004 Power supply unit PLC module

Technical data of product parameters

 The port alternation process described 086351-004above continues until slave 3 is powered on and the communication fault clears. Commands for slave control interrupt the polling process and are issued through the current poll port. After the slave has acknowledged the command, the LTQ resumes the polling process. In the event of a communication fault between the current poll port and a commanded slave, the LTQ will issue the command through the other communication port.The LTQ is successfully 086351-004communicating to each slave and sets the bits equating to Channel A and B to 0. A value of 0 in the Channel A and B status indicate successful communication. Example 2: The LTQ is successfully communicating to slaves 1, 2, 4, and 5 via both ports. Slave number 3 is without power causing the slave 3 network board bypass relays to de-energize. This de-energizing of the bypass relays shorts the signal through the network board and isolates the slave from the DDC-100 network. Example 3: The LTQ is successfully communicating to slaves 1, 2, 3 via port 1 086351-004 and 4, 5 via port 2. When a slave does not communicate within a predetermined time-out period the LTQ sets the corresponding Channel bit to a value of 1. This example indicates a wiring problem between slave 3 & 4. This problem is typically a cable breakage, short, or improperly terminated wire. Example 4: The LTQ is attempting to communicate to the slaves via both ports but is unable to reach any slaves via port 2. This typically indicates a broken cable connection at port 2 or at the first slave from port 2, broken or 086351-004 shorted cable between the LTQ and the first slave from port 2, improperly terminated wires, or loss of power to the RS-232/485 converter if attached to the LTQ port 2. Non-Looped Network Truth Table via Port 1 Polling Only (Recorded in Slave Status Register

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