Code S53-062: Safety Function Warnings

An error occurs in the communication betw een the control unit and remote I/O unit. Disconnection of a cable Fault in remote I/O unit Fault of power supply to remote I/O unit The communication interrupted station is displayed in he xadecimal for each RIO channel when an error occurs in the communication between the control unit and remote I/O unit. When the control displays a communicatio n stop station, it divides the RIO channel stations (up to 64 stations) into groups of 8 stations. If any of the 8 stations has the communication st op error, the number is displayed with the alarm. Z55 RIO communication stop __ __ __ __ __ __ __ __ (a) (b) (c) (d) (e) (f) (g) (h) (a)(b): RIO1 (c)(d): RIO2 (e)(f): RIO3 (g)(h): "00" fixed (a)(b), (c)(d), and (e)(f) indicate t he following stations in hexadecimal. bit0: 1st to 8th stations bit1: 9th to 16th stations bit2: 17th to 24th stations bit3: 25th to 32nd stations bit4: 33rd to 40th stations bit5: 41st to 48th stations bit6: 49th to 56th stations bit7: 57th to 64th stations (Example) Stations #1 and #8 of RIO1 and stations #24 and #64 of RIO3 have the communication error. Z55 RIO communication stop 0100 8400 The RIO error status can be monitored through the R re gisters on the self diagnostic or I/F diagnostic screen. Remedy  Check and replace the cables.  Replace the remote I/O unit.  Check the power supply (existence of supply and voltage). System warning