Grass Valley 2200 - Manual (Page 73)

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Data Transfer (5E and DE) Commands
If the receiver has requested a retry several times and there is still an error, or there
is some other unrecoverable error, then the transfer may be terminated by sending
an abort message. Although only the receiver can request a retry, either the
transmitter or receiver can send an abort message at any time during a transfer, if
an error is detected.
The format of the abort message is as follows:
Switcher-supplied abort codes are:
ABORT CODE MEANING
01 Request for an E-MEM register which is empty
02 Invalid sequence number received
03 Internal communication error
04 Bad file header
05 Bad Master E-MEM header
06 Bad individual E-MEM header
07 Bad Keyframe data
08 Invalid byte count
09 (reserved)
0A Invalid Register number
0B Invalid Effects Address
When the editor transfers data to the switcher, the editor should check the ÒStatus
RepliesÓ returned by the switcher for the presence of any errors.
If the editor needs to terminate a transfer and it sends an abort message, then the
switcher will acknowledge receipt of this abort message by returning an abort
message also, with an abort code of 80H. This will indicate the end of the transfer.
Byte
Count Effects
Address Command
Code Sequence
Number Register
Number E-MEM
Data
06H EX DEH FFH FFH nnH abort code (1 byte)