INFICON PSG55x ATM to Medium Vacuum Gauge (RS232C / RS485C) - Manual (Page 9)

tira59e1 (2010-07) RS232C.cp
9
(concluded)
PID Name Description
Factory
setting Min. Max. Type
457 High Trip Point 1 Hysteresis Hysteresis High Trip Point 1 [mbar] 1.00E+01 5.00E-05 1500 Fixs32en20
458 Low Trip Point 1 Hysteresis Hysteresis Low Trip Point 1 [mbar] 5.00E-05 5.00E-05 1500 Fixs32en20
459 High Trip Point 2 Hysteresis Hysteresis High Trip Point 2 [mbar] 1.00E+01 5.00E-05 1500 Fixs32en20
460 Low Trip Point 2 Hysteresis Hysteresis Low Trip Point 2 [mbar] 5.00E-05 5.00E-05 1500 Fixs32en20
461 Setpoint 1 Extended Status
Extended status of Setpoint 1
0 Not active
1 Low Trip Point active
2 High Trip Point active
3 High and Low Trip Point active 0 Uint8
462 Setpoint 2 Extended Status
Extended status of Setpoint 2
0 Not active
1 Low Trip Point active
2 High Trip Point active
3 High and Low Trip Point active 0 Uint8
To calculate the result from a Fixx32enXX value, multiply or divide it by a factor of
2
XX
.
Example Fixs32en20
The hysteresis of the High Trip Point Setpoint 1 is to be set to 10 mbar. For this
purpose 10 is multiplied by 2
20 (Fixs32en20). The value 10485760 is therefore
transmitted.
The following examples show how read and write requests are made.
The required parameter has PID 221.
From Master to PCG5xx:
0 1 2 3 4 5 7 9 9+n
MSB LSB MSB LSB
Address Device ID Ack MsgLength Cmd PID Reserved Data Crc
0x00 0x00 0x00 0x05 0x01 0x00DD 0x0000 - 0xAB21
From PCG5xx to Master:
0 1 2 3 4 5 7 9 9+n
MSB LSB MSB LSB
Address Device ID Ack MsgLength Cmd PID Reserved Data Crc
0x00 0x02 0x01 0x09 0x02 0x00DD 0x0000 0x375A05BF 0xD9BB
The required parameter has PID 224. To set the unit to Torr, 1 must be written.
From Master to PCG5xx:
0 1 2 3 4 5 7 9 9+n
MSB LSB MSB LSB
Address Device ID Ack MsgLength Cmd PID Reserved Data Crc
0x00 0x00 0x00 0x06 0x03 0x00E0 0x0000 0x01 0x346D
From PCG5xx to Master:
0 1 2 3 4 5 7 9 9+n
MSB LSB MSB LSB
Address Device ID Ack MsgLength Cmd PID Reserved Data Crc
0x00 0x02 0x01 0x05 0x04 0x00E0 0x0000 - 0x94EA
Data Format
Fixs32enXX
Examples
Read request (reading a
pressure)
Write request (setting a unit)