Pfeiffer TPG 261 - Communication Protocol

BG 5195 BEN / A (2011-05) TPG261.oi 67
Messages are transmitted to the TPG 26x as ASCII
strings in the form of mnemonic operating codes and
parameters. All mnemonics comprise three ASCII char-
acters.
Spaces are ignored. <ETX> (CTRL C) clears the input
buffer in the TPG 26x.
HOST TPG 26x Explanation
Mnemonics
[and parameters] ──────────>
<CR>[<LF>] ─────────────>
Receives message
with "end of mes-
sage"
<───────── <ACK><CR><LF>
Positive acknowledg-
ment of a received
message
When requested with a mnemonic instruction, the
TPG 26x transmits the measurement data or parameters
as ASCII strings to the HOST.
<ENQ> must be transmitted to request the transmission
of an ASCII string. Additional strings, according to the
last selected mnemonic, are read out by repetitive
transmission of <ENQ>.
If <ENQ> is received without a valid request, the
ERROR word is transmitted.
5.1.2 Communication
Protocol
Transmission format
Transmission
protocol
Reception format