S7 Byte Swap

[Guest Guest_Rod]

Hi all, I currently have an S7315-DP/PN setup as a profibus slave to a Kuka Robot. I have all the comms working OK but when i set an INT value in the PLC the wrong bits are set in the robot. So basically i need to swap the most significant byte with the least significant byte to get the right value in the robot. The integer value is defined in a data-block and BLKMOVE instruction to QW##. Being "not so experienced" with siemens step7, whats the easiest way to swap bytes for an integer value to write to the master profibus node??

[jacekd 0]

CAW instruction ?