CTR & TMR Instruction in 25 year Old TI PLC

[mTariq 0]

Dear All. I am upgrading 25 year old TI plc to Step7. The TI PLC is as follows: 5TI Expander: Model: 5TI-5500 Supply Volt: 102-132 VAC 47-63 HZ Serial # : 15EX8510000491 Full load current: 0.75 A 5TI Sequencer: Model : 5TI-1031-1 Supply Volt : 102-132 VAC 47-63 HZ Serial # : 81030077 Full load current : 0.75 A I have the hard copy of TI Program. I am facing Difficulty in understanding TMR & CTR in TI Program. The TMR & CTR instructions are attached with this post: Kindly help me in finding out, how this timer and counter instruction is working Which one is on-delay or off-delay timer?? Which one is up or down counter?? Your help regarding this matter will be highly appreciated. Regards, Tariq TMR___CTR_Instruction.zip

[weasmaster 0]

Tariq, It looks like the same instruction as the TI 500 series processor. I attached the CTR and TMR pages from the manual. BTW, Siemens bought the PLC division from TI a long time ago. There is documantation on the Siemens website for the TI stuff still. Mike CTR___TMR.pdf Edited 28 Jan 2008 by weasmaster