The controller can detect short circuits in end devices (loads) that are connected to transistor outputs located on snap-in or expansion I/O modules.
If a short circuit is detected on either an expansion or snap-in I/O module, SB 5 turns ON.
If the short circuit is located on an:
I/O expansion module, the location is indicated in SDW 5.
Snap-in I/O module, the LSB in SDW 6 turns ON.
SDW 5 provides a bitmap. Each I/O expansion module included in your controller's hardware configuration is assigned a number, 0-7, according to its place in that configuration. In the bitmap, bits 0-7 correspond to these place numbers.
In the bitmap below, short circuits have been detected in devices that are connected to expansion modules 1 and 3.
SDW 5
Please note that although an SW is 32 bits long, only 16 bits are shown below.