Hello,
I am using an LK204-7t-iu. Everything has been fine during development - then suddenly the display will not display anything - not even the startup screen, unless I hold the overide key down on power up. I have tried resetting the baud rate, and contrast after power up with manual overide. I set up the data unlock then save modes, - nothing works.
If I disconnect the serial lines and power up the display i get the same result. No startup screen or anything.
It does appear that the keypad is communicating in this condition.
If I hold the overide key it works normally until I cycle power.
Very confused... any ideas?
I have a trade show in 12 days! Please help!
lk204 blank on startup
Hi,
I'm sorry to hear that you are having some trouble with you LK-204-7T. I'll do the best I can to get you up and running, but I need to express to you that I do not have as much experience with this model as I should, so please take any code/script snippets I give you with a grain of salt. While they should be correct, they may only be "close"; you may have to spend some quality time with the manual to get them working.
That being said; here is what I would try:
While in override try writing and reading back 0x55 (85 dec) to the customer data segment (Section 11.5 and 11.6 in the manual). Then cycling the power to the units and try reading back the data again; I just want to make sure that the eeprom is working and you're reliably communicating with the display.
The command should look like:
/254//52//85/ <- Sets the Customer Data
/254//53/ <- Reads back the Customer Data
Once you have confirmed that the eeprom and communications are working, you know it's most likely a settings issue (not malfunctioning hardware). At this point I would try reseting the data security to 0x0, set remember to on, set the baud rate, set the backlight to on, set the backlight level to 0xFF, set the contrast to 0x60 (or any nice middle point), and restart. With a little luck you'll be back in business.
Script
/254//202//245//160//0/ <- Clears all security (Section 11.3)
/254//147//1/ <- Enables the data remember feature (Section 11.2)
/254//57//51/ <- Set Baud rate to 19200 (Section 4.2)
/254//66//0/ <- Enable the backlight/Turn on (Section 10.2)
/254//153//255/ <- Set Brightness to max (Section 10.4)
/254//152//255/ <- Save brightness as default (Section 10.5)
/254//80//96/ <- Set contrast to 0x60 (Section 10.7)
/254//145//96/ <- Saves the contrast value of 0x60 to default (Section 10.8 )
Give the unit a sec and restart it. If it still doesn't give you any love, drop me a post, and I'll try to figure out something on Monday (when I can get my hands on a unit).
Brian Ingwersen
Engineering
Matrix Orbital
I'm sorry to hear that you are having some trouble with you LK-204-7T. I'll do the best I can to get you up and running, but I need to express to you that I do not have as much experience with this model as I should, so please take any code/script snippets I give you with a grain of salt. While they should be correct, they may only be "close"; you may have to spend some quality time with the manual to get them working.
That being said; here is what I would try:
While in override try writing and reading back 0x55 (85 dec) to the customer data segment (Section 11.5 and 11.6 in the manual). Then cycling the power to the units and try reading back the data again; I just want to make sure that the eeprom is working and you're reliably communicating with the display.
The command should look like:
/254//52//85/ <- Sets the Customer Data
/254//53/ <- Reads back the Customer Data
Once you have confirmed that the eeprom and communications are working, you know it's most likely a settings issue (not malfunctioning hardware). At this point I would try reseting the data security to 0x0, set remember to on, set the baud rate, set the backlight to on, set the backlight level to 0xFF, set the contrast to 0x60 (or any nice middle point), and restart. With a little luck you'll be back in business.
Script
/254//202//245//160//0/ <- Clears all security (Section 11.3)
/254//147//1/ <- Enables the data remember feature (Section 11.2)
/254//57//51/ <- Set Baud rate to 19200 (Section 4.2)
/254//66//0/ <- Enable the backlight/Turn on (Section 10.2)
/254//153//255/ <- Set Brightness to max (Section 10.4)
/254//152//255/ <- Save brightness as default (Section 10.5)
/254//80//96/ <- Set contrast to 0x60 (Section 10.7)
/254//145//96/ <- Saves the contrast value of 0x60 to default (Section 10.8 )
Give the unit a sec and restart it. If it still doesn't give you any love, drop me a post, and I'll try to figure out something on Monday (when I can get my hands on a unit).
Brian Ingwersen
Engineering
Matrix Orbital
Hi Kedz,
The info Brian has provided should get you up and going, if you're unfamiliar with the code style, check out our uProject. It'll work quite nicely if you go over to the uploader tab, open up the other tree on the left, and drag the raw data command into the window. Then just copy and paste the code one line at a time, and it should work beautifully.
~Troy
The info Brian has provided should get you up and going, if you're unfamiliar with the code style, check out our uProject. It'll work quite nicely if you go over to the uploader tab, open up the other tree on the left, and drag the raw data command into the window. Then just copy and paste the code one line at a time, and it should work beautifully.
~Troy
Troy Clark
Design & Development
Matrix Orbital
Design & Development
Matrix Orbital