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PW3335A985-01
Command Execution Time
Command execution time indicates the time for analyzing and processing long form commands.
However, the command execution time for commands with data is the time described according to the data format
specified in the <data portion>, and for query commands it is the time when the header is ON.
The instrument performs measurements, calculations, and updates the display repeatedly in 200 ms cycles.
Measurements and calculations are given priority over command processing, and require a maximum of 150
ms. Therefore, a maximum delay of 150 ms may be encountered from the time a command is received until
analysis begins.
• Updating the display may be delayed if the analysis processing is not completed in time, even if the internal
processing time is met.
• All commands are sequential.
• When communicating with a controller, the time required to transfer the data must be added.
The amount of time required for the data transfer depends on the controller (communications).
The RS-232C transfer time for a starting bit, data length of 8, no parity bit, and a stop bit (10 bits total) with a baud
rate setting of N bps is calculated as follows:
Transfer Time T [1 character/second] = Baud Rate N [bps] / 10 [bits]
The measurement value is 11 characters so the time required to transfer one piece of data would be 11/T.
(Example) 9600 bps: 11 / (9600 / 10) = 11 ms (approximately)
• Wait a few moments after making any changes via setting commands to allow the measurements to stabilize.
Command
Execution time (excluding communication time and delays to the start of analysis)
*WAI
200ms or less
The other commands
10 ms or less
Errors During Communications
An error occurs when messages are executed in the following cases:
•
Command Error
When message syntax (spelling) is invalid
When the data format in a command or query is invalid
•
Query Error
When the response message exceeds 4,000 bytes
When there is a query after an
•
Execution Error
When invalid character or numeric data is present
•
Device-dependent Error
When an error occurs during self-testing
When a restricted operation (such as changing the range) is attempted during an integration operation (when the
INTEGRATOR indicator is lit or flashing)
When a restricted operation (such as changing the range) is attempted during the Hold state
command is executed in any state other than the Hold state
Note:
A command error will always occur if a message is spelled incorrectly or if any data is present after a query.
When an error occurs with a query, no response message will be generated for that query.
(150 ms)
(Priority given to measurement and
calculation processing)
(50 ms)
(200 ms) Display update rate: 5 times per second
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