91
Technical support / Re:Data Logger
« on: February 23, 2011, 04:23:53 AM »
Ok thanks. I will give it a go!
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92
Technical support / Re:Data Logger
« on: February 23, 2011, 01:54:16 AM »
Hi Thanks,
What function would I use to send the command out to the device?
Cheers
What function would I use to send the command out to the device?
Cheers
93
Technical support / Re:Data Logger
« on: February 22, 2011, 02:30:23 AM »
Go to Download Center for Manual, Driver and Tutorial.
Keyword: DB-DP11118
http://www.sure-electronics.net/download/
Keyword: DB-DP11118
http://www.sure-electronics.net/download/
94
Technical support / Re:Data Logger
« on: February 22, 2011, 02:24:04 AM »
Hi,
Still looking to crack this one!!!
Can you please have a look at the attached PDF. Its an SD card to serial device that is accessible from the RS232 port.
The command lines seem simple enough if I can send these from the PLC RS232 port?
Can you advise what function I would need to use to write a DM value to the SD card?
Many Thanks
Still looking to crack this one!!!
Can you please have a look at the attached PDF. Its an SD card to serial device that is accessible from the RS232 port.
The command lines seem simple enough if I can send these from the PLC RS232 port?
Can you advise what function I would need to use to write a DM value to the SD card?
Many Thanks
95
Technical support / Re:PLC Program Checksum Failure
« on: February 11, 2011, 03:18:40 AM »
Hi,
The PLC is connected to a regulated power supply. We dont use any batteries in the panel as the system controls some ac pumps - no ac no running.
When the system looses power I guess there will be some spikes from relays coils collapsing etc.
Can you recommend a suitable surge protection device?
Cheers.
The PLC is connected to a regulated power supply. We dont use any batteries in the panel as the system controls some ac pumps - no ac no running.
When the system looses power I guess there will be some spikes from relays coils collapsing etc.
Can you recommend a suitable surge protection device?
Cheers.
96
Technical support / PLC Program Checksum Failure
« on: February 10, 2011, 07:33:38 AM »
Hi,
We had a failure on a site that has 10+ of your TMD PLC's. The red pause LED was lit and dispite cycling the power, the PLC the problem remained.
I used the online monitoring function and noticed the following message from the PLC was "PLC program checksum failure, please reload program"
The program has been running for 18 months without a glitch. I reloaded the program and the syatem was back online.
What do you think would cause this error as we have not had this message before?
Cheers
We had a failure on a site that has 10+ of your TMD PLC's. The red pause LED was lit and dispite cycling the power, the PLC the problem remained.
I used the online monitoring function and noticed the following message from the PLC was "PLC program checksum failure, please reload program"
The program has been running for 18 months without a glitch. I reloaded the program and the syatem was back online.
What do you think would cause this error as we have not had this message before?
Cheers
97
Technical support / Re:Using Nano as a Protocol converter
« on: December 14, 2010, 12:44:15 AM »
Ok Thanks for the advice.
98
Technical support / Using Nano as a Protocol converter
« on: December 13, 2010, 12:40:04 PM »
Hi,
I'm thinking of using a Nano PLC to read some modbus slave data into the DM via the RS485 port.
Then use My Modbus TCP master access the PLC via the Ethernet port to read / write data back and forth to the slave device.
I need to ensure I don?t end up over writing values that are being read into the same location simultaneously, likewise I'm not sure how the PLC will respond to the TCP port reading a DM value at the same time the serial port is writing the data??
I was also thinking about request / response timing on both ports and if a buffer may be needed?
?
Do you guys have any words of advice before I commit too much time to this? do you think I would be better off purchasing an off the shelf serial to Ethernet server?
Any thoughts appreciated.
I'm thinking of using a Nano PLC to read some modbus slave data into the DM via the RS485 port.
Then use My Modbus TCP master access the PLC via the Ethernet port to read / write data back and forth to the slave device.
I need to ensure I don?t end up over writing values that are being read into the same location simultaneously, likewise I'm not sure how the PLC will respond to the TCP port reading a DM value at the same time the serial port is writing the data??
I was also thinking about request / response timing on both ports and if a buffer may be needed?
?Do you guys have any words of advice before I commit too much time to this? do you think I would be better off purchasing an off the shelf serial to Ethernet server?
Any thoughts appreciated.
99
Technical support / Re:Custom Protocol
« on: December 06, 2010, 02:48:44 AM »
Ok. Thanks for the help.
100
Technical support / Re:Custom Protocol
« on: December 03, 2010, 02:52:15 AM »
I cant see any reference to carriage return in the manual. Some more images below
101
Technical support / Re:Custom Protocol
« on: December 03, 2010, 02:50:50 AM »
It looks to me that they send the string in hex even though they state it must be is ASCII??
I will try to complete some tests in the mean time using a serial port monitor to send some test strings.
I noticed in a previous post you guys have a program for testing serial communications, is this available for download?
If the string can be sent in hex, what is the best command to use? when a response is received how do I extract the data from the response and store in a DM?
I will try to complete some tests in the mean time using a serial port monitor to send some test strings.
I noticed in a previous post you guys have a program for testing serial communications, is this available for download?
If the string can be sent in hex, what is the best command to use? when a response is received how do I extract the data from the response and store in a DM?
102
Technical support / Custom Protocol
« on: December 02, 2010, 02:39:51 AM »
Hi,
I'm trying to communicate to a device that uses the M50 protocol.
The device command information must be transmitted in ASCII format and the responses will be received in ASCII format. see attached picture from the manual.
I need to use the setprotocol 3,10 for custom protocol but I'm not sure how to send the command string using the outcomm command??
I'm trying to communicate to a device that uses the M50 protocol.
The device command information must be transmitted in ASCII format and the responses will be received in ASCII format. see attached picture from the manual.
I need to use the setprotocol 3,10 for custom protocol but I'm not sure how to send the command string using the outcomm command??
103
Technical support / Trashed Analogue Input
« on: September 22, 2010, 02:45:26 PM »
Hi,
I beleive I have a damaged AI.
After correcting some wiring in a control panel I noticed one of the AI's wasn't reading the input signal. The AI was subject to 24VDC for the best part of a weeK!
Looking at the PCB, after the input terminal there is a capacitor and a resistor bank "RA4"?, then off the to main processor.
Are there any checks I can do or components that I can replace?
Cheers
I beleive I have a damaged AI.
After correcting some wiring in a control panel I noticed one of the AI's wasn't reading the input signal. The AI was subject to 24VDC for the best part of a weeK!
Looking at the PCB, after the input terminal there is a capacitor and a resistor bank "RA4"?, then off the to main processor.
Are there any checks I can do or components that I can replace?
Cheers
104
Technical support / Re:Data Logger
« on: September 14, 2010, 03:05:28 PM »
Ok Thanks for the info.
Do you think USB support for flash drives will find its way onto the PLC's? it would certainly help this application!
I?m sure this would also be handy for other functions as well
One last question on the subject, if I can find a 2.5"hdd with an Ethernet port effectively making it a portable NAS drive, can I use the function described earlier saving data as a CSV or txt file?
PS. What is the name of this function!
Cheers
Do you think USB support for flash drives will find its way onto the PLC's? it would certainly help this application!
I?m sure this would also be handy for other functions as well
One last question on the subject, if I can find a 2.5"hdd with an Ethernet port effectively making it a portable NAS drive, can I use the function described earlier saving data as a CSV or txt file?
PS. What is the name of this function!
Cheers
105
Technical support / Re:Data Logger
« on: September 14, 2010, 11:49:23 AM »
FYI,
I have found this product:
http://www.adfweb.com/home/products/datalogger_modbusrtu.asp
It will log approximately 85,000 samples if the registers are consecutive and approximately 45,000 samples if the registers are all not consecutive.
This might just do the trick. I could roll over every 24 hours and just use 305 DM's, 50 per input.
I have found this product:
http://www.adfweb.com/home/products/datalogger_modbusrtu.asp
It will log approximately 85,000 samples if the registers are consecutive and approximately 45,000 samples if the registers are all not consecutive.
This might just do the trick. I could roll over every 24 hours and just use 305 DM's, 50 per input.