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ABB LT C391 AE01 HIEE401782R0001 Board spare parts

¥668.00

Part Number:LT C391 AE01 HIEE401782R0001

LT C391 AE01 HIEE401782R0001 If there are quality issues, you can help repair them

If there is any need, please contact us and we will reply to you as soon as possible

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Contacts:kelly CHEN

Description

This function causes one or more characters to be read from the specified port. The characters are

read from the internal input buffer and placed in the specified input data area. The function returns

both the number of characters retrieved and the number of unprocessed characters still in the input

buffer. If zero characters of input are requested, only the number of unprocessed characters in the

input buffer is returned.

If insufficient characters are available to satisfy the request and a non-zero value is specified for the

number of characters to read, the status of the operation is not complete until either sufficient

characters have been received or the time-out interval expires. In either of those conditions, the port

status indicates the reason for completion of the read operation. The status word is not updated until

the read operation is complete (either due to timeout or when all the data has been received).

If the time-out interval is set to zero, the COMMREQ remains pending until it has received the

requested amount of data, or until it is cancelled.

If this COMMREQ fails for any reason, no data is returned to the input data area. Any data that has

not been read from the internal input buffer remains and it can be retrieved with a subsequent read

request.

If the input data memory type parameter is specified to be a word memory type, and if an odd

number of bytes is actually received, then the high byte of the last word to be written with the

received data is left unchanged.

As data is received from the serial port it is placed in the internal input buffer. If the buffer becomes

full, then any additional data received from the serial port is discarded and the Overflow Error bit in

the Port Status word (See Read Port Status Function) is set.

 

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Price issue: If you find that other suppliers offer a cheaper price for the same product, we are also willing to provide you with a reference price and give you further discounts.
Contact Us:+86 18106937731
Whatapp:+86 15359293870
Email: geabbdcs@gmail.com / 2872270648@qq.com
Contact Person: Chen

 

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