Impulse 463N Instrukcja Użytkownika Pobierz pdf (Strona 78)

©Sealevel Systems, Inc.

SL9049 - 11/2010

SeaI/O Manual

Disabling the Rotary Address Switch and Limiting Software Address Range Selection is not

available on older SeaI/O units (Before Firmware Version 2). In addition, the following

modules do not support it:

 462

 463

 470

As noted earlier, rotating the rotary switch from a non-zero address to the address zero

position will reset the unit to the default state of address 247 and 9600 baud. There are many

situations where this is not desirable. In the event you wish to disable the rotary switch or

simply limit the range of software selectable addresses that may be set, you can do so by

sending the “WriteMultipleRegisters (function 0x16)” MODBUS command to the unit. Address

300 (decimal) should contain the low order byte of the lowest address the unit will accept.

Address 301 will contain the high order byte. Once this command has been issued, the rotary

switch will be completely ignored by the firmware.

To reset the unit to “normal” operation, you can issue the MODBUS “Broadcast Reset Message

(function 0x19).

This setting can also be configured through MaxSSD under the “Range Configuration” tab,

shown below on the next page.

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Impulse 463N Instrukcja Użytkownika Strona 78