Sequencer

[Guest Newbie]

Hello; Does Omron PLC (CS1G with CX Programmer) have any instruction that is equivalent to Allen Bradley's PLC SQO instruction (sequencer output)? Thanks in advance for any sugguestion.

[Jay Anthony 118]

Although there is not a direct replacement for the SQO instruction, it would fairly simple to construct the sequencer with only a few instructions. Look at ASFT(17) and WSFT(16) for file operations. Use ANDW(34) and ANDL(610) for the mask and destination. Use BSET(70) and XFER(71) for initialization of the file. Also look at MCMP(19) for file to file comparison.

[Guest Drew]

The best instruction I have seen to model the SQO is a data collect instruction (COLL). The main difference is that the data collect does not use a MASK. You can use a reversible counter (with a defined preset value) to step through each position with defined length of your source base address.

[Jay Anthony 118]

Great idea! If you need a mask, use a second COLL to point toward the table of masks. Then use ANDW(34) to bring the output of the two tables together.