General errors

Mapping of the digital and the byte-oriented Bus Terminals onto a fixed address

Problem
You want a constant start address for the digital inputs and outputs.
Solution
With the KS2000 software, you can enter an offset start value for the digital inputs and outputs in table 0. The byte-oriented Bus Terminals should not jut into this process image, i.e. no overlap should occur. Table 0: Register 19 Offset for digital outputs, Register 20 Offset for digital inputs: "0" is the default setting (automatic Bus Terminal mapping)
Example
You have a KL3002 and a KL2012. In the default case, the KL3002 maps onto %IB0- %IB7 and %QB0-QB7 in the memory. The digital output terminal would now map to %QX8.0 and %QX8.1. As soon as you now plug another byte-oriented Bus Terminal, the process image of the digital Bus Terminal is moved to a higher memory. You can now pre-empt this by entering 20 in register 19. This means that KL2012 now maps onto %QX20.0 and %QX20.1.

Problem
Your digital outputs drop away.
Solution
Your program takes longer than 100 ms. Because the internal K-Bus runs synchronous with your PLC program, it is no longer triggered early enough, and the Bus Terminal watchdog becomes active. This can be rectified by triggering a short refresh of the K-Bus. The setting can be carried out with the KS2000 software. Table 1 Register 17 LowByte cycle time for K-Bus refresh (<= 80 ms) HighByte Retries
Recommendation
Enter 0x0350 in Table 1 Register 17. This means three retries, once every 80 ms. Note that this causes the Bus Terminal watchdog to increase to 240 ms during a fault condition (this is not true in case of a K-Bus error, where the watchdog will remain at 100 ms).