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Topics - cdenk

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46
Technical support / RS-232 COMMUNICATIONS
« on: April 25, 2005, 06:09:36 PM »
Have a T100MD+, trying to communicate with serial port to PC.  From TL server 2.1 am able to set port, and with command string IR*, get appropriate response.  Then from Trilogi 5.3 try to set PLC clock, and after clock settings window get "log in to TLServer" window, where it wants IP address. I must be missing something dumb. :)

47
Technical support / UPS for PLC controlling standby generator
« on: April 07, 2005, 06:55:10 PM »
I Have a PLC (Tri-PLC T100MD888) that will be managing a Tri-Fuel standby generator. Normal power for the PLC will be a 120 VAC to 12VDC linear power supply. The 120 VAC will either be power company or from the generator. There is a delay between switch overs of up to a minute or more. The generator power supply is a 12VDC lead acid battery that will be charged and maintained by the generator's charging system and a 120 VAC charger. The issue is, the brief period while the generator comes up to speed, or switching back to power company power, the PLC needs to remain up and running, otherwise when it would reset, the generator would stop, and oscillation between power sources would result. Have thought about parallel diodes, but the lead acid battery and charges could frequently have voltage above the 12VDC linear power supply. How can I keep the PLC from resetting?  :)

48
Technical support / 60 hz frequency and voltage sensing
« on: March 15, 2005, 02:50:48 PM »
On a T100MD888, how would I measure the frequency and voltage of 120/240 volt 60 HZ power using the pulse width and ADC features of the PLC. Object would be to set alarms if out of range.  :)

49
Technical support / T100MD100 with 12 volt power
« on: March 15, 2005, 02:46:45 PM »
With T100MD100, MD-EXP4040, and MD-HMI, are there any issues with usung 12 volt power. On the MD-HMI, the 15 watt resistor for backlight, should it be a different value?

The application is controlling a tri-fuel standby generator, and the backup PLC power will be the generator's 12 volt battery. Will brief interuptions in the PLC power , like when a relay (coil from 120 volt power) drops to the battery supply. The brief period of inactivity is not an issue as long as the PLC at worst resets and then continues. Is there a better way to handle the power change over?

50
Technical support / Start event every "n" (1-4) weeks
« on: February 14, 2005, 03:38:49 PM »
With a T100MD888, how would I start an event every "N" weeks. The application is an exerciser for a standby generator.

Also assuming with Basi will be able to display time, day, date on attached display.  :)

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