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Messages - raan

Pages: 1 [2] 3
16
Technical support / Lost comm after program load T100MD+
« on: August 09, 2008, 06:30:44 PM »
I downloaded a program to the plc and after resetting the the plc the run error and pause light are now flashing red and I am unable to communicate with the plc. I suspect  that some cust functions that I redid to increment the two pwm outputs upwards may have caused some sort of overflow errors. Please advise

17
Technical support / Re:Hooked up power to the wrong connector
« on: December 03, 2007, 01:28:17 AM »
Changing out the 74hc595 ic did not correct the problem. Do you have any type of board repair or exchange?

18
Technical support / Re:Hooked up power to the wrong connector
« on: December 02, 2007, 06:18:17 AM »
Thanks. I tried removing the 8pin dip but it still did not work. I am going to replace the 74hc595 and see if this fixes the problem

19
Technical support / Hooked up power to the wrong connector
« on: November 30, 2007, 11:18:12 PM »
I inadvertently hooked up +24vdc to the rs485 terminals on a t100md. Needless to say the plc no longer communicates (tried *IR no response) and the PLC is no longer running the program it was loaded with. Can  I replace some ICs and/or components to resurrect it or is it permanently damaged?
 :'(

20
Technical support / plcmon.jar library file
« on: October 17, 2006, 12:40:33 PM »
Hello
I own 3 of the MD100 plc's and would like to get your plcmon.jar api library file to develop another web  based interface. Where can I download it?

21
Technical support / Re:AMPMETER USING OP-AMP
« on: March 13, 2006, 08:49:41 AM »
Linear Technolgies www.linear.com makes a variety of current sensing amplifiers like the LT6100 which outputs a stable 0-5v signal from a shunt resistor. They are cheap, much easier to use than dual ended op amps,  work well with the plc and can handle bidirectional inputs.

22
Technical support / Schematics for Repair Purposes
« on: June 17, 2004, 11:51:31 AM »
A few times in the past we have had shorts on the outputs which led to failure of the board which were easily repaired by replacing the ULC2803 IC. However this last time we had a failure that did more damage than can be repaired by simply replacing this IC. Is possible to obtain a schematic of the output stage of the md888? The processor still works.
raan
ps the shorts were caused by incorrect hookup of a wiring harness on a terminal strip with poor accessiblity.

23
Technical support / Re:How to express the fuction such as sin/cos
« on: June 17, 2004, 11:38:43 AM »
Re:Taylor series
While it is true that the formulation of the taylor series appears complex you don't really need   but a few of the terms to achieve good accuracy  particularily if you are computing over a small interval. You just need to test it out to find how many terms you need to achieve the desired accuracy.

24
Technical support / Can no longer set PLC's Time from TriLogi 5.12
« on: May 25, 2003, 06:41:14 PM »
Anyone
I was running the Trilogi web server 2.0 and was able to set the time on a T100MD888 using both the trilogi application and java applet. Now I cannot set the time through either approach. Anyone have ideas as to what may be wrong? However I still can set the time with the DOS application. I tried re-installing the Trilogi app and server but to no avail.
raan

25
Technical support / Sanyo Security Serial Protocol SSP
« on: June 05, 2003, 03:15:34 PM »
I am replacing a 25 pushbutton operator's station that controls both a time lapse VCR and a digital multiplexer tied to 4 cameras. The pushbuttons currently switch in  a resistive ladder network  to contol the VCR and the mux. Originally I was going to use an md888 to switch in the correct ohm value,  but I discovered tha both devices thru rs485 ports support a Sanyo Protocol called Security Serial Protocol. I have the command set from the Sanyo manuals and would like to use the plc to issue the command sequences both don't have any solid ideas about how this proprietary protocol and the command set interrelate.  Any ideas? Where can I find some material about rolling in a protocol to the plc?

 I also thought about a 0-20 ma signal to fool the analog ports of the two boxes but the plc output doesnt have enough resolution
thanks
raan

26
Technical support / Re: Trigonometry Calculation
« on: June 19, 2003, 05:21:39 PM »
In the past with another brand of plc, I have used a simple math technique of approximating a trig function with a taylor series power expansion of the form:
cos(x)= 1-(x*x)/2  +(x*x*x*x)/(1*2*3*4) -(x*x*x*x*x*x)/(1*2*3*4*5*6) .....see any calculus book for the taylor series expansion of the cosine function
raan

27
Technical support / logging date and time of an input contact
« on: June 19, 2003, 05:29:14 PM »
Do you have any suggestions of how to log the date and time in the DM[n] array of when a input closes? I tried several approaches and must have something wrong because it bongs out every time I try to load the program into the plc. I need to log about 700 such entries on a 7 day basis and then reset at the end of the week.
raan.

28
Technical support / Power Supply limits to the T1100MD
« on: November 05, 2003, 11:23:25 AM »
I have two nominally 12vdc wheelchair batteries connected in series that charge up to 15 volts each to power up a dc motor. I am using a separate 24 dc supply to power the plc controlling the motor speed thru PWM. Can I use the 30vdc motor supply to power the plc and eliminate separate 24vdc power supply?

2. Also I am using the  2nd pwm circuit on the plc to control the charging current to the batteries from an external battery charger which would mean that during charging, if I eliminated the separate supply to the plc, the plc would see  the charging  pulses going to batteries with a peak value around 35VDC.
Thanks
Raan

29
Technical support / EEPROM Program Memory
« on: November 23, 2003, 05:17:24 AM »
Hola
Some types of memory have a limitation on the number of times they can be overwritten. Is there a limitation on the number of times the md100 program memory can be over written? If so what it is it and can replacement be purchased if the limit has been exceed?
Raan

30
Technical support / RTC
« on: November 23, 2003, 04:52:51 PM »
Hola
I have tried to set the RTC on the plc and when I execute the command nothing happens. I tried reset when doing real time monitoring still nothing happens. The pwm program running on the plc is functioning fine.
raan

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