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106
Technical support / Re:I7018
« on: November 26, 2010, 09:28:27 AM »
Hi. I'm confused. What does connecting them on the same bus mean? Can I connect 2 MD888 and a I7018 together using RS485? 1 MD888 will be the master giving the readmodbus and writemodbus command while 1 MD888 and I7018 will be slaves. Should work right?

Thanks

107
Technical support / Re:I7018
« on: November 22, 2010, 09:39:03 AM »
Hi.

1) I7018 works perfect with MD888 when I'm connected to MD888 using RS232 but not RS485. Why?

2) Can I use I7018 on a 1s clock pulse to monitor the current temperature and at the same time use readmodbus to read the dm on another MD888 on a 1s clock pulse? How?

108
Technical support / Re:I7018
« on: November 11, 2010, 06:25:42 PM »
Hi. do I need to do any calibration?

109
Technical support / I7018
« on: November 11, 2010, 09:32:54 AM »
Hi. Can I just use I7018 with MD888 by loading the program example and connect with a J type thermocouple?

110
Technical support / Re:RS485
« on: November 03, 2010, 09:11:09 AM »
Hi. All the examples seem to be controlling the digital IO only. Any examples that control the DM?

Regards

111
Technical support / Re:RS485
« on: November 01, 2010, 09:20:31 PM »
Hi. After reading a lot about netcmds and readmb2, I still do not quite understand them. What should the command be if I want the slave to write the HSC and DM to the Master DM and vice versa? Is the DM and HSC updated realtime or will there be a delay?

Thank you.

112
Technical support / Re:RS485
« on: October 31, 2010, 07:32:39 PM »
Thanks for the reply. If the laptop is using Auto485 to connect to the 2 MD PLC, can the laptop be used as master and read the DM data from the 2 slave PLC?


113
Technical support / Re:RS485
« on: October 29, 2010, 11:41:18 PM »
Hi. thanks for the quick replay.

1) Can I retrieve slave PLC data using excellink when I'm connected to master PLC using RS232? Both are connected by RS485.

2) Can the data memory of slave PLC be read to master PLC?

Thank you.

114
Technical support / RS485
« on: October 29, 2010, 10:40:58 PM »
Hi. How do I use my laptop to read data from slave MD888 if I'm connected to master MD888 using RS232? Do I need to set any pin on slave PLC to let it become slave?

Thank you

Regards
Ken

115
Technical support / Re:Motor control
« on: October 18, 2010, 08:05:14 AM »
Hi. After many trial and errors, I've finally found the source of the problem. It seems that the USB to 232 converter is the problem. The problem disappears as soon as I operate my laptop on battery or use a desktop with a RS232 port for communication.

Thank you for all the help.

116
Technical support / Re:Motor control
« on: October 15, 2010, 02:13:33 AM »
Hi. I've yet to try using rs485. I've installed a 100amp noise filter between the power inlet and the motor controller. At 0 rpm with holding torque, the time on monitor screen is not updated per second. However, when the servo motor is running, the time on the monitor screen is updated every second. Any idea what is happening and how to solve the problem? Thanks.  

117
Technical support / Re:Motor control
« on: October 09, 2010, 05:37:23 AM »
Hi. Is there noise filter built into the 888? Or can I just add any off the shelf noise filter between the power supply and the plc? Any specifications that I can use? Any CE certification? Any EMI filter?

Or should I just change a usb to rs232 cable to try again? Will RS485 work better than rs232?

Regards
Ken

118
Technical support / Re:Motor control
« on: October 04, 2010, 06:51:29 PM »
Hi. Will check it out. Will using 485 to communicate be better?

119
Technical support / Re:Motor control
« on: October 04, 2010, 07:57:01 AM »
Hi. It's just a simple program to try out setdac. There's only a custom function for setdac. Everytime I activate the controller without any connection to 888, the TL server just fails to connect to 888. It's a servo motor controller btw. Will posting the manual help?

120
Technical support / Re:Motor control
« on: October 03, 2010, 10:29:02 PM »
Hi. After much trial and error over the weekend, seems like the communication between laptop and 888 is having problem whenever I activate the motor controller even though the both of them are not connected in any ways. Any idea why is that so? I'm using USB to RS232 cable. Is the cable having problem?

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