MODELS 483C30, 483C50, 482M179 AND 483M217 GENERAL OPERATION MANUAL
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Query Format: Unit#:Ch#: AUTR?
Response format: Unit#:Cmd:Ch#:=current state (0=off,1-on,2=immediate)
Query: 2:1:AUTR?
Query Response: 2:AUTR:1=0;
SAVS
The SAVS command is used to store the current channel setting as the default settings that will be restored on
power up. This command invokes a function and therefore has no query capability.
Setting:
2:1:SAVS = 0\r\n ( unit 2, channel 1, Any value )
Setting Response: 2:SAVS:ok
Query:
N/A
WTED
The WTED command is used to write binary TEDS data to the selected channel’s sensor when the channel is in
ICP or voltage mode. This command provides a mechanism for writing a single page of data to a Maxim 1-wire
memory chip. A page is defined as 32 bytes for DS2431 or DS2433 devices or, in the case of a DS2430A
memory chip, 32 bytes and the 8 byte application register content for a total of 40 bytes if the application
register is being used. Otherwise a DS2430A page is also 32 bytes. The user is not required to know what chip
is in the sensor in most cases. The TEDS write function internal to the signal conditioner determines what chip
it is communicating with and whether application register operations are possible. The user does however, need
to construct the command appropriately to indicate that, should there be an application register available, it
should or should not be used.
Setting:
<unit>:<channel>:WTED =<B0>:<B1>:<B2>:<B3-Bn-1>:<Bn>\r\n
Where:
B0 - Total bytes in message
B1 - 1st 8 bytes go to the App Register if one is available (0=FALSE | 1=TRUE)
B2 - Page (0 for DS2430A | 0-3 for DS2431 | 0-15 for DS2433
B3 - Bn-1 TEDS page content (up to 40 bytes; 8 app reg, 32 EEPROM)
Bn - 8-bit Checksum of B0-Bn-1
Notes:
•
All message numbers are decimal values.
•
The checksum in Bn is a simple checksum. Add B0-Bn-1 and send the least significant 8 bits.
•
If the sensor has a DS2430A 1-wire memory chip and the Application Register is locked then it is
up to the user to remove the Basic TEDS from the bytes to be written but include them in the TEDS
CS calculation required in byte 0 of the EEPROM memory for 1451.4 compliant templates . The
Application Register status can be determined by issuing the RTED command. It is the 1
st
value
after the ‘=’ sign in that commands response.
Setting Example
1:1:WTED=36:0:0:23:64:22:16:30:4:49:0:219:1:35:68:4:94:197:200:204:208:4:9:13:17:41:44:1:69:1:94:
161:194:30:117:221\r\n