Terumo CDI 550, Operator'S Manual

Page: 141 / 173

communication with other devices appendix c C-10
Acknowledge (‘K’):
Acknowledge packets are sent back to the requesting device (usually the pump-
ing system, but for some commands, the CDI System 550) to both confirm that the
request came through successfully, and to provide any data associated with the
request. The description portion of any given Command/SubCommand item will
describe when an Acknowledge packet is to be used.
SubCommand for an Acknowledge packet will always be ‘0’, but the data portion will
be of the format CSD..D where:
C - Command sent to the System 550 for which this Acknowledge is made
S - SubCommand sent to the System 550 for which this Acknowledge is made
D..D - Data associated with the Acknowledge. Data content is request-specific
For example, if a Get Time (G2) packet is sent to the System 550, the response would
be an Acknowledge packet in the form:
<STX>ABBLLLLK0G2HH:MM:SSZZ<ETX>
The Command is Acknowledge −
K
The SubCommand is always 0 for Acknowledge −
0
The data portion is the Command/SubCommand
sent, plus the data requested
−
G2HH:MM:SS
No Acknowledge (‘N’):
Value Name Description
‘0’ Invalid Packet
Length
Sent when the driver detects more or less characters
than the length field indicated.
‘1’
Invalid Device ID
Sent when the pump ID character is not valid for incom-
ing packets to the CDI Monitor. For the System 1/ Terumo
NEO Pump Interface, the Device ID must be ‘A’ .
‘2’
Invalid CRC Value Sent when the CRC calculation doesn’t match the CRC
value sent in the packet.
‘3’ Invalid
Sent when the Command character is not a valid one.
Command for incoming packets to the CDI System 550,
the Command character must be one of: (‘S’, ‘G’).
‘4’ Invalid
SubCommand
Sent when the SubCommand character is not valid for
the given Command character. In all cases, the Sub-
Command character must be one of: (‘0’..‘7’).
‘5’ Invalid Number of
Parameters
Sent when the number of parameters specified in the
data field is incorrect, or if no parameters were sent, but
at least one was required.
‘6’ Parameter(s) out
of bounds
Sent when one or more of the parameters in the data
field is out of the given range.
‘7’
Operation Failure Sent when a requested operation fails, for example if
assigning the arterial flow results in an error even though
the value was within the correct range.