Title: +038=360.000-OU045T_03-PCD2.m4160 PLS SBC - Hardware Manual.pdf
1) No analogue, counter and motion control modules on the socket with base address 240 (apart from PCD3.W3x5 and PCD3.W6x5, which are not affected by the watchdog)1) No analogue, counter and motion control modules on the socket with base address 240 (apart from PCD3.W3x5 and PCD3.W6x5, which are not affected by the watchdog)2) output 255 cannot be used for digital I/O modules3Watchdog - connection diagramWDSupplyPCD2.M5_25 26 22 23 - WDWD++01+24VA-moduleMain switchStartBridging switch for CPU-StartProcess0V1) Switching capacity of the watchdog contact: 1 A, 48 VAC/DCThe status of the watchdog relay can be read via I 8107 “1” = Watchdog relay on.3.16 Software watchdogThe hardware watchdog provides maximum security. However, for non-critical applications, a software watchdog may be sufficient, whereby the processor monitors itself and the CPU is restarted in the event of a malfunction or a loop.