INFICON SKY CDGxxxD (RS232C) - Manual (Page 10)

10
tira49e1-a (2010-02) RS232C.cp
Parameter name Data type Description Byte No. 2 Byte No. 3 Comment
RESET uint8_T / W 0 0 Power reset: Starts continuous
pressure output
RESET Factory uint8_T / W 1 0 Factory reset: Sets factory confi-
guration
Zero_adjust uint8_T / W 2 – Starts zero offset adjustment
W = Write
<data_value>×a
Setpoint_level xy =
b
× F.S.R._Mantisse×10 (F.S.R._Exp)
Parameter 1) Description
Setpoint_level xy Setpoint threshold in the selected pressure unit.
1) Further parameter →  11, table "Parameter"
• Minimum value lower switching threshold = 0 ; negative values are not
admissible.
• Maximum value lower switching threshold = F.S.R. – 1 % hysteresis.
Zero_Adjust_Value contains the zero pressure offset value required for zeroing
(writable and readable).
• Automatic zero_adjust function via key or command (→ table "Variables for
bytes No. 2 and 3 (special services)").
• Base-Pressure-Adjust for adjusting a defined zero offset, e.g. if the required
final pressure as indicated in the operating manual is not reached.
The Zero_Adjust_Value consists of the high and low byte and has to be converted
with the "Pressure value" formula (
→  4).
<data_value>×a
Zero_Adjust_Value =
b
×F.S.R._Mantisse×10 (F.S.R._Exp)
Parameter 1) Description
Zero_Adjust_Value Zero pressure offset in the selected pressure unit
( →  11, table "Parameter").
1) Further parameter →  11, table "Parameter"
Maximal remaining offset value. The Zero_Adjust can only be executed within this
value.
Variables for bytes No. 2 and 3
(special services)
Description of variables
Setpoint_level xy
Zero_Adjust_Value
Remaining_Zero