zarky44

I was trying to program a +/- 2% error on a massflow transmitter. I know this is probably amatuerish but I just don,t understand major fault at F8:0 when rung was true while simulating. N7:0 and N7:1 both had zero value, so I am going to assume this was a divide by zero fault which I thought was only a minor fault. The value in F8:0 when fault occurred was something like 1.#gnan# didn't write it down as I had to hurry up and reset fault. Am I off base here? Z. zOOOPS.pdf

Hello, Yes I have already submitted capital project request to upgrade systems to CLX. I just wouldn't want to hold my breath waiting on approval. The PC I was describing did have a KF2 for the PLC5's DH+. I took a PKTX PCI card that we had for spare for HMI systems and installed it in PC. I got to thinking if the RSlinx Pro was seeing both highways (ETH to SLC5's and DH+ to PLC5's) then maybe the PC would act as a bridge. The blush answer of NO is what I figured. The side car would be a good cost effective way just shifting I/O may be a little much. Just to visualize I have a SLC5/05 (ETH) in our main electrical room. The cooling supply and exhaust fans for various motors on two different PLC5 controlled lines are in the same MCC. These fans are started and stopped locally on startup and shutdown. I was wanting to start and stop remotely just for energy conservation. Lines go into cleandowns for hours between different product changes. The drives automatically reduce field power when no demand present or disabled, so should not be big deal to stop cooling motor's while line is down. I think I am going to install 1791-24A8 remote I/O blocks. We have DH+ wire and conduit. would only have to by one more as one is in spares. Thank for Advice, Z

I have a Dell PC running Xp PRO. I use it to access PLC5's and SLC5's via rslogix5 and 500. RsLinks common to both. The SLC's are ethernet and PLC5's are DH+ through a PKTX PCI card. My question is this, can I use the Read/Write MSG blocks of each PLC and use the Dell PC like a bridge? Probably would only need one word of data.

Well, your the first smart politician with an accent I have ever seen . Copied and pasted to document for future use. Z

That makes sense. It is acknowledging a request to send data it just busy (full) and can't. Thanks, Z

In a PLC5, under channel status, looking at tab "Send Data ACK". What does the "Received but full" = tell you. Is this a serious issue or minor, because system appears normal. At the time I looked it had 26000 received with a value of 66 in "Rec but Full". Z

Eureka!! You are correct. I went back to RSLinksand the little display list of settings. I was looking for a button or options on the side. I double clicked the 57k line and there it was. I changed to 115k on both ends and tremendous improvement, well 2x faster i guess. I am going to get some 82ohm resistor for each end and try 230k in the future, as they are wanting to start the line up. Z

Mentor, Yes they are independent of each other. I have a local vender pricing the options for CLX upgrades or ENET adapter. Will see what he comes up with. Not in a hurry this issue has been tossed around for awhile. Jesper, Sorry about how I wrote that. Am being multitasked today I tried switching the cables. Apparently the jumpers on PKTX card specifies which channel to talk to and perhaps baud rate to PLC. All my data went to ???? when I moved CH 1A to 2A. The Maint PLC is using a KF2 and it worked on Ch 1A, I didn't look to see if I could change baud on 1A after switch. I was interested in how 2A reacted. I rebooted the I/O server just to make sure it repolled PKTX card, still ????. RSLinks Driver "AB_KT-1" node # 77 ID & Channel "0 Ch1A" DH+ Speed "57.6k I think this channel thing is a simple improvement that can be worked out. Excellent suggestion! Z

Hmm! Which CLX would you recommend to replace PLC5/60. Both progams are using about 55K memory. I just looked at channel configuration on one. Ch 1b RIO 230.4K Ch's 1A, 2A, and 2B DH+ showing 57K. CH 2A goes to maint. PC with rslogix. Ch 1A goes to host PC with PCi KT card and the display for baud is darkened like no option to change. Ch 2B goes to PCi KT card in PC controlling feeders. So 2B and 1A are main data channels and both set at 57K baud. I wonder if the KT cards are limiting factor! From what I read in.pdf for 1784-PXTX(D) anything less than 2000 feet should run at 230k baud. Time to experiment! Z

Yes the used ones are about half price the new ones. Hard to show where $6K will get its payback when all it is doing is speeding up bus. Money has really tightned up the last couple years. I don't think the CLX+DHRIO will help much in our system. Two lines have dedicated PLC5/60 with one DH+ channel back to host PC. This is where the three 80E's came in, one for each line and other a spare. Everything else is slc's. I understand wanting to upgrade, and would like to do it, but the PLC5 is durable and reliable. You know why fix it if it ain't broke. I think now I am leaning toward the 1785-ENET card ($700), it has two negatives though. One it has to go in first slot so I will have to move first slot I/O elseware and the second I am not so sure about. Reading the info on card I got the impression that you had to use MSG's to move data blocks. Both doable though. We get about a 3 or 4 second delay at HMI on a write and return confirmation. Later, Z

Thanks Ken, I had looked there but didn't have the two EE's on end. 1785-L80e was "item not found". Not exactly cheap for old equipment. Z

Anybody know of a deal on a plc5 80e? Wanting to try upgrading plc5 60 to Ethernet without a lot of programming changes to HMI. Would need three all together. Thanks, Z

I used a 702 to simulate TC in the field. 0°C and 700°C sent 3.9mA and 19.93mA. So I go to the plc program the CPT. I had used the 32 to 1292 because I wanted the reading in °F. So I expected the result to be around 65 for room temp. as pipe was empty. With a 5400 count the result I was getting was 141. So my Math is wrong I thought! I convinced myself of this when I now realize the TC is faulty. I assumed 5400 was about right! Geeez! Now if you could just delete this post as I feel very stupid. Thanks, Z

Is it possible to install a ctrlogix rack with a ethernet comm card and a DH+ RIO card no processor to speed up data block read and writes to iFix I/O server to PLC5. I was told this would work from a controls salesman. I cannot see that it would make any difference as the DH+ between PLC5 and installed ctrlogix rack would still be same bus as before just shorter.