Watlow PM LEGACY
™
Limit Controller
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33
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Chapter 2 Install and Wire
Connecting a Computer to PM Controls Using B&B 485 to USB Converter
Note:
Do not leave a USB to EIA-485 converter connected to Standard Bus without power (i.e.,
disconnecting the USB end from the computer while leaving the converter connected on
Standard Bus). Disturbance on the Standard Bus may occur.
Note:
When connecting the USB converter to the PC it is suggested that the Latency Timer be
changed from the default of 16 msec to 1 msec. Failure to make this change may cause
communication loss between the PC running PM LEGACY™ Limit Configurator software
and the control.
To modify Latency Timer settings
follow the steps below:
1. Navigate to Device Manager.
2. Double click on Ports.
3. Right click on the USB serial port in
use and select Properties.
4. Click the tab labeled Port settings
and then click the Advance button.
Address 2
Address 1
Data Format
38,400 baud
8 data bits
no parity
1 start bit
1 stop bit
PC Software Protocol - Standard Bus
EZ-ZONE Configurator software
0847-0326-0000
USB
Port
Use twisted pair wires such as Cat 5 cabling. Do not route with power carrying
conductors. Daisy chain wire up to 16 EZ-ZONE devices.
Slot
A
Slot B
Slot C
Slot
A
Slot B
Slot C
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Содержание PM LEGACY PM3
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