ES-U-2016-RM EasySync, ES-U-2016-RM Datasheet - Page 38

• Manufacturer Part Number: ES-U-2016-RM
• Description: USB Interface IC USB to 16 Ports RS422/RS485, Metal
• Manufacturer: EasySync

7.3
Some common Windows Device Driver issues can be resolved by changing the advanced driver options.
7.4
The following resources may be helpful:
If you have tried the steps shown in section 7 and are still having problems with your ES-U-xxxx-x
converter, you can contact EasySYNC support using the contact information on the following page.
12. You may need to repeat steps 7 – 11 several times depending on the model of converter that you
13. Once installation is complete, you will see the following message appear. Your converter is now
Device Driver Options
Further Information on Resolving Driver Issues
Windows keeps track of all COM port assignments. If multiple EasySYNC products have been
connected to a single system, the COM port number will increase, even if the other devices are
not attached. If the higher COM port assignments are not acceptable for the application, known
unused COM port numbers should be uninstalled according to the FTDI installation guide:
http://www.ftdichip.com/Documents/InstallGuides.htm.
are using. Each time, please ensure that you select „Install from a list or specific location‟ in step
9 as Windows defaults to „Install the software automatically‟.
ready to use. Please refer back to step 3 on page 12 to verify the installation in Device Manager.
Device Times Out
The default settings of the device driver assume typical data transfers of hundreds to thousands
or more bytes at a given time. Some applications, such as a GPS device, only send data in short
packets, often only a few bytes. If this is the case, it may be necessary to adjust the driver
buffer size and/or latency timer to smaller values. These values can be adjusted through the
Advanced Driver Options as noted in Figure 13 on page 13. The buffer size can be reduced to 64
bytes. The latency timer can be set as low as 2ms. A setting of 1ms will cause unnecessary USB
traffic and could adversely affect data transmission.
Erratic mouse pointer (or my adapter appears as a mouse)
The device driver defaults to query an attached device to find out whether it is a mouse or
modem, consistent with native COM port operation. Some RS232 peripherals constantly send
short packets of data, causing the host system to “think” a mouse or modem has been attached.
These short packets will interfere with normal mouse operation causing the pointer to jump
around the screen. If this happens, disconnect the RS232 device and uncheck the Serial
Enumerator option, also found on the advanced driver options screen (see Figure 13 on page 13).
COM port number in use
Look at the Installation guide for your operating system at the link below
http://www.ftdichip.com/Support/Documents/InstallGuides.htm
Look at the troubleshooting app note
http://www.ftdichip.com/Support/Documents/TechnicalNotes/TN_104_Guide%20to%20Debuggin
g_Customers_Failed_Driver_%20Installation_%20on_%20Windows.pdf
If other devices with FTDI chips are installed in the system, check with all manufacturers of these
devices for the latest device drivers.
Figure 26
©2010 - 2011 EasySYNC Ltd.
Hardware installed successfully
Document Reference No.: ES_000061
USB to Serial Converters Manual
Clearance No.: ES
Version 1.2
# 35
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