Aim MIL-STD-1553 - Apicmdrtresptime

MIL-STD-1553 Reference Manual
304
Chapter 8 – Remote Terminal Functions
8.1.18 ApiCmdRTRespTime
Prototype:
AiInt16 ApiCmdRTRespTime ( AiUInt32 ul_ModuleHandle, AiUInt8 biu, AiUInt8 rt_addr,
AiFloat resp_time );
Driver Command:
API_RT_INI_RESP (0x91)
Purpose:
This function is used to redefine the Response Time of the selected Remote Terminal
(identified by its RT Address).
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Value
Description
0..31
Remote Terminal Address
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Response Time in µs.
Value
Description
4..63.75
Defines the RT response time in 0.25µs steps.
Response time values less than 4µs are not allowed.
If the response time is programmed to less than
4.5µs, the terminal does not check, if the lines are
busy before it transmits the status word. In this case,
the word count high check is disabled.
At 3910 transfers, this method is also used by the LS-
RT and LS-Monitor transfer evaluation or HS transfer
preparation, respectively.
Note: Due to the extended operations, which have to be performed on Mode Codes,
the response time may be up to 7µs / 9µs. For Mailbox monitoring this function
is not provided. Due to the gap measurement definition of the MIL-STD-1553B, a
min. physical bus idle time of 2µs can be achieved in 1 Mbit Transmission Mode
(min. 4µs Response Time).
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Return Value
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All API functions return API_OK if no error occurred. If the return value is not equal
to API_OK the function ApiGetErrorDescription can be used to obtain an error
description.