Manual

Chromalox Instruments and Controls
A-51643 Rev. 6 10/06/03 30
Table 11: Protocol
TM
Plus Diagnostic Register Bit Assignment
Bit #
Description
0
NA
1
NA
2
EEPROM Data Error
3
NA
4
NA
5
NA
6
NA
7
A/D
8
Not Used – Loop Error
9
Not Used – Tune Error
10
Not Used -- Available for Application Specific Support
11
Not Used -- Available for Application Specific Support
12
Not Used -- Available for Application Specific Support
13
Not Used -- Available for Application Specific Support
14
Not Used -- Available for Application Specific Support
15
Not Used -- Available for Application Specific Support
Example: Return the diagnostic register from slave device 2 (with an EEPROM error).
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
$02
Sub-function lo
$02
Data hi
$00
Data hi
$00
Data lo
$00
Data lo
$04
CRC
$----
CRC
$----
5.3.1.4 [08 04] Force Listen Mode Only
Forces the slave into Listen Only Mode. This isolates it from the other devices on the network, allowing
them to continue communicating without interruption form the addressed slave. No response is returned.
When the slave enters this mode, all active communications are turned off. All messages broadcast or