nehpets

Oops looks like i'm a little rusty with mitzi's and stand corrected, For further information take a look at the link below. mitsubishi manuals Steve

Just another angle, the status of the counter is retained ONE BUTTON LATCH UNLATCH 3 version.RSS Steve

Hi, welcome to the forum The analog units are special blocks and are configured and interrogated via buffer memories using the TO and FROM instructions The special blocks are numbered from the right of the main unit. Main Unit : FX3U-48MR-ES-A Special Adapter : FX3U-3A-ADP...................No. 1 Expansion Board for special Adapter : FX3U-CNV-DB Expansion Module #1 : FX2N-8EX Expansion Module #2 : FX2N-4DA...............No. 2 Expansion Module #3 : FX2N-4DA...............No. 3 Expansion Module #4 : FX2N-8AD...............No. 4 I have attached a user guide Hope this helps Steve 067759.pdf

Welcome to the forum, I would suggest that the 'lamptest' pushbutton is wired incorrectly it is probably wired normally closed instead of normally open, this would be indicated by input I:2.0/5 being on (active) when the pushbutton is not pressed. Steve

Hi, welcome to the forum. The first valve is indeed a ball valve, the solid line to the side seems to indicate that it's capped or plugged. The second valve is not necessarily a gate valve, as the symbol indicates a valve in general, the square above it just indicates that it an automatic valve albeit electrical or pneumatically actuated. As for the P&ID drawing, there is not nearly enough information given to be able to interpret whats going on. Steve

You may find some answers here. My link Steve

What Picture?? There's no attachment. Steve

OkiePc This is not strictly true - you only need one reference file which can be initialized on first scan - all the other files N100, N1010, etc can be referenced against that. JRoss Whereas this is a nice simply answer to the problem - depending what else is on the comms. highway ie plc multidrops, display units, etc this could dramatically slowdown any inter communications better to condition the triggering of the communication. Steve

You could try The file bit compare instruction (can't quite remember but i think the plc5 has it) The source would be your set of 50 words (#N100:0), (#N101:0) etc. The reference would be another set of 50 words ie #N200:0 which you set to zero or any mask you wish (this could be common to all the sets to be monitored) The result can be any word file you want (this stores the bit position the mismatch was found) The Length would be 800 (50words*16bits) If the found bit is set (.FD) then trigger your MSG block you would need 35 of these (keep an eye on the scan time and watchdog values) Hope this helps Steve

I don't know if this helps as I'm only familiar with the fx range. while Y54 is true then the instruction DFRO will be active DFRO reads a 32 bit store of a special function block buffer memory (encoder unit), the special unit address is 'H4' , the buffer memory store is 'K4' , it's transferred to 'D66', and 1 word is read 'K1' [DFRO H4 K4 D66 K1] do you have any information on the encoder module at the PLC (not the encoder itself) I'm not sure but I don't think you need to zero the encoder except maybe to re-reference it at sometime generally you read the value and do comparisons to achieve actions. The value in D66 is a result of the instruction DFRO reading the encoder values. Steve have a look at this AD61 manual

I have a small problem, I'm using a number of ultra 100 indexing drives on devicenet When a homing routine is initiated, the motor is driven to a home sensor then backs off the sensor and once again driven to the sensor, I then send a homing reference signal to the drive to tell it that this is home position. The problem I am getting is that on occasion when homing is initiated it does the routine but on the final approach to homing sensor it ignores it and carries on until the hardwired over-travel switch is tripped. This tends to happen more often than not after an E-Stop. Does anyone have any Idea why this should happen? Steve

You have to change the timer number T0 to T199 are 100mS time base T200 to T245 are 10mS time base T246 to T249 are 1mS time base retentative timers (battery backed) T250 to T255 are 100mS time base retentative timers (battery backed) T256 to T511 are 1mS time base Hope this helps Steve

The FROM & TO instructions read and write to special extension units (Axis module for instance) to be more precise the buffer memories (BFM's) The FROM instruction reads from extension unit - the first value is the unit number, the next value is the buffer memory number, the next value is the transfer destination, the last value is the number of memory points to transfer. The TO instruction writes to the extension unit. You can download the manuals from the Mitsubishi automation website Steve

The quick answer is yes, but you need a card type 620-0060 have a look at this link Honeywell Steve

The site was hacked yesterday they now say they have sorted it now see here Steve

You Don't say which mitsi PLC's your using, However try here you may find it helpful. Steve

Perhaps instead of us trying to second guess the problem you could post some part or component numbers, so we can do some research for ourselves and supply a more definitive answer to your dilemma. Steve

first of all the 24volt power supplies do not appear to be AC outputs they are 24VDC as it states that they are halfwave rectified. There should be no problem paralleling the power supplies All voltage meaurements should be made with reference to 0Volts or ground Switch your multimeter to a suitable DC range NOT AC you should read something like 24v x 1.41 for a halfwave rectified output Do not short analogue to power supply you will probably damage the analogue card. Why you need to know the voltage difference between the 230VAC and the 24VDC power supply output is beyond me I Hope this helps Steve

Have a Look this, AB Servo Link It may be what you're after. Steve

Thanks for the quick response looks like I need to put my hand in my pocket Steve

Being New to Step7, I would like to ask what is probably a dumb question. I have programming software step7 v5.3 and would like to get online with a s7-300 processor with the view to backup the running program. I also have a laptop with both a serial port (9pin) and a card slot for PCMCIA card. The s7-300 is connected to a HMI unit with a MPI/DP HMI adaptor (6ES7-972-OCA11-OXAO). My question is :- is it possible to use the HMI adaptor to get online? If not What do I require to get Online? Regards Steve