Manual

Chromalox Instruments and Controls
A-51643 Rev. 6 10/06/03 29
Query
Response
Field Name
Data
Field Name
Data
Slave address
$02
Slave address
$02
Function
$08
Function
$08
Sub-function hi
$00
Sub-function hi
$00
Sub-function lo
$00
Sub-function lo
$00
Data hi
$AA
Data hi
$AA
Data lo
$55
Data lo
$55
CRC
$----
CRC
$----
5.3.1.2 [08 01] Restart Communications Option
The slave is reset, its communication port initialized and restarted, and all of its communications event
counters cleared. If the slave is currently in Listen Only mode, no response is returned. This function is
the only one that brings the port out of Listen Only mode. If the port is not currently in Listen Only
mode, a normal response is returned. This occurs before the reset is executed. When the slave receives
the query, it attempts a restart and executes its power-up confidence tests. Successful completion of the
tests will bring the port online.
Example: Restart Communications on slave device 2.
Query
Response
Field Name
Data
Field Name
Data
Slave address
$02
Slave address
$02
Function
$08
Function
$08
Sub-function hi
$00
Sub-function hi
$00
Sub-function lo
$01
Sub-function lo
$01
Data hi
$00
Data hi
$00
Data lo
$00
Data lo
$00
CRC
$----
CRC
$----
5.3.1.3 [08 02] Return Diagnostic Register
The contents of the slave‘s 16 bit diagnostic register are returned in the response. The assignment of
diagnostic register bits in Protocol
TM
Plus controllers is shown below. In the register, bit 15 is the high-
order bit. The description is TRUE when the corresponding bit is set to logic 1.