HTP 7350P-636, Руководство по установке

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lp-548 Rev. 000 Rel. 004 Date 1.11.19
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D. Baud Rate
The baud rate (communication speed) can be set on the control display to either 9600 or 19200 baud. All HTP appliances, as well as any other
device on the same bus and the MODBUS/BACnet master, must have the same baud rate setting. Select the highest baud rate that offers the
most reliable communication performance over the bus.
Some things that can affect communications are:
• Long wire runs
• Wire quality
• A noisy electrical environment
• The number of devices on the bus.
These conditions may require using a lower baud rate.
LCD Display:
1. When at Parameter 39, press ENTER, then use UP or DOWN to select the desired setting from Table 4.
2. Press ENTER to store the Baud Rate.
3. Press the RIGHT button to advance to Parameter 40 – Parity.
LED Display:
1. When at Parameter 39, press TEMP, then use + or - to select the desired setting from Table 4.
2. Press the TEMP button to advance to Parameter 40 – Parity.
Parameter 3 Character LED Display Setting LCD Text Display Setting Description
39 0 9600 BAUD RATE = 9600 (factory default)
39 1 19200 BAUD RATE = 19200
Table 4 - Parameter 39 Settings
The final (RS-485) baud rate is determined by this setting in
conjunction with dipswitch 9 on the adapter. Table 5 shows all
possible final baud rate selections.
LED Display:
1. When at Parameter 38, press TEMP, then use + or - to select the desired address.
2. Press the TEMP button to advance to Parameter 39 – Baud Rate.
Control Baud Rate Setting Dipswitch 9 Position Final RS-485 Baud Rate
9600 OFF 9600
19200 OFF 19200
9600 ON 36400 (9600 X 4)
19200 ON 76800 (19200 X 4)
Table 5 - Final Baud Rate Settings
E. Parity and Stop Bits
NOTE:
This setting only applies to MODBUS operation. The
BACnet protocol does not utilize parity for communication and
this setting will have no effect.
The parity/stop bits parameter of the MODBUS/BACnet adapter must be set to match the rest of the devices on the bus. Although it is
common to set serial devices to use no parity, setting the parity to even or odd may improve communications reliability on all connected
devices on the bus.
This parameter has 4 possible selections which should be sufficient to establish communication with other devices. These selections are
outlined in Table 6.
LCD Display:
1. When at Parameter 40, press ENTER , then use UP or DOWN to select the desired setting from the table below.
2. Press
ENTER
to store the Parity.
3. Press and Hold the
RESET
button to store all parameters and exit the Installer Menu.
Parameter 3 Character LED Display Setting LCD Text Display Setting Description
40 0 1 ST No parity 1 stop bit (factory default)
40 1 2 ST No parity 2 stop bits
40 2 E PA Even parity 1 stop bit
40 3 O PA Odd parity 1 stop bit
Table 6 - Parameter 40 Settings
Part 4 - MODBUS Registers and BACnet Objects
A. Primary Data Tables
Table Data Type Read / Write Description
Discrete Inputs Single bit Read only Data can be provided by an I/O system.
Coils Single bit Read / Write Data can be altered by an application program.
Input Registers 16-bit word Read only Data can be provided by an I/O system.
Holding Registers 16-bit word Read / Write Data can be altered by an application program.
Table 7 - Supplementary Information
LED Display:
1. When at Parameter 40, press
TEMP
, then use + or - to
select the desired setting
from Table 6.
2. Press and Hold the RESET
button to store all parameters
and exit the Installer Menu.