Heidolph Hei-CHILL, Руководство по эксплуатации

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Operation
25
Error message Description
ERR_2 Incorrect entry (e.g. data buffer overflow)
ERR_3 Incorrect command
ERR_5 Syntax error in value
ERR_6 Impermissible value
ERR_32 The upper temperature limit is lower or the same as the
lower temperature limit.
▪ The RS 232 interface can be operated with or without a hardware
handshake (RTS/ CTS).
▪ Do not send commands in a package,
pause of at least 0.1 seconds between commands
▪ End every command with CR (Carriage Return, Hex=0D) or
LF (Linefeed, Hex=0A)
▪ The response from the chiller always ends with CRLF
▪ Date format XX.X or -XX.X (X stands for a number)
▪ As well as ”_“, ” “ (blank space) is also permissible
Cable and interface test for RS232
Computer Thermostat
Signal 9-Pole Sub-D socket 25-Pole Sub-D socket 9-Pole Sub-D socket Signal
with a
hardware
handshake
without a
hardware
handshake
with a
hardware
handshake
without a
hardware
handshake
with a
hardware
handshake
without a
hardware
handshake
RxD 2 2 3 3 2 2 TxD
TxD 3 3 2 2 3 3 RxD
DTR 4 - 20 - 4 - DSR
Signal
Ground
5 5 7 7 5 5 Signal
Ground
DSR 6 - 6 - 6 - DTR
RTS 7 - 4 - 7 - CTS
CTS 8 - 5 - 8 - RTS
With a hardware handshake:
▪ If connecting a thermostat to the PC, use a straight-through connection (1:1) and not
a null modem cable.
▪ The RS232 interface can be directly connected to the PC with a straight-through (1:1)
cable.
Without a hardware handshake:
▪ Set the corresponding operating mode on the PC.
▪ Use shielded connecting cables.
▪ Connect the shielding to the connector housing.
▪ Galvanically isolate the cables from the rest of the electronics.
▪ Do not connect up unused pins.