-43-
Released 2018-01-12
Drawing No. LP0932
PXU MODBUS REGISTER TABLE
12/08/2017
The following is an example of the necessary query and corresponding response for holding register 2. In this example register 2 is the decimal value
123.
Query: 01 03 00 01 00 01 D5 CA
Response: 01 03 02 00 7B F8 67
Notes:
1. The PXU registers can be read as holding (4x) or input (3x) registers.
2. The PXU should not be powered down while parameters are being changed. Doing so may result in an incomplete write to the non-volatile memory
and produce checksum errors.
REGISTER
(4x)
REGISTER NAME
LOW LIMIT
HIGH LIMIT
FACTORY
SETTING
ACCESS
COMMENTS
FREQUENTLY USED REGISTERS
1
Process Value (PV)
N/A
N/A
N/A
Read Only 1 = 1 Display unit
2
Active Setpoint (SP)
-999
9999
0
Read/Write 1 = 1 Display unit
3
Setpoint 1 (SP1)
-999
9999
0
Read/Write 1 = 1 Display unit
4
Setpoint 2 (SP2)
-999
9999
0
Read/Write 1 = 1 Display unit
5
Setpoint Deviation
N/A
N/A
N/A
Read Only 1 = 1 Display unit
6
Alarm 1 Value
-999
9999
1000
Read/Write 1 = 1 Display unit
7
Alarm 2 Value
-999
9999
2000
Read/Write 1 = 1 Display unit
8
Alarm 3 Value
-999
9999
3000
Read/Write 1 = 1 Display unit
9
Output Power 1
0
1000
0
Read/Write 1 = 0.1%; writable when in manual mode only.
10
Output Power 2
0
1000
0
Read/Write 1 = 0.1%; writable when in manual mode only.
11
PB Proportional band (Active)
1
999(.9)° or
9999 (process)
700
Read/Write 1 = 1 Display unit
12
Integral time (Active)
0
9999
120
Read/Write 1 = 1 second
13
Derivative time (Active)
0
9999
30
Read/Write 1 = 1 second
14
Integration default (Active)
0
1000
0
Read/Write 1 = 0.1 % output power
15
PID parameter set selection
0
6
0
Read/Write 0 = PID Set 1, 1 = PID Set 2, 2 = PID Set 3, 3 = PID
Set 4, 4 = PID Set 5, 5 = PID Set 6, 6 = Auto
16
Auto-Tune Start
0
1
0
Read/Write 0 = No; 1 = Yes
17
Control Mode Transfer (Auto/Manual)
0
1
0
Read/Write 0 = Automatic (PID), 1 = User (Manual Mode)
18
Controller Status
0
4
1
Read/Write 0: Stop, 1: Run, 2 = End (Profile mode), 3 = Pause
(Profile mode), 4 = Advance Profile (Profile mode)
19
Setpoint Select
0
1
0
Read/Write 0 = SP1, 1 = SP2
20
SP Ramp Rate
0
999(.9)° or
9999 (process)
0
Read/Write 1 = 1 Display unit/minute; 0 = Ramping disabled
21
LED Status
N/A
N/A
N/A
Read Only
Bit State: 0 = Off, 1 = On
b0: ALM3, b1: ALM2, b2: °F, b3: °C, b4: ALM1, b5:
OUT2, b6: OUT1, b7: AT
22
Pushbutton Status
N/A
N/A
N/A
Read Only
Bit State: 0 = Key pressed, 1 = Key not pressed
b0: N/A, b1: F2, b2: Down, b3: P, b4: N/A, b5: F1, b6:
Up, b7: D
23
Alarm Reset
0
7
0
Read/Write
Bit State: 1 = reset alarm, bit is returned to zero
following reset
b0: Reset Alm1, b1: Reset Alm2, b3: Reset Alm3
24
Setpoint Ramping Disable
0
1
0
Read/Write 0 = Enabled, 1 = Disabled
25
Integral Action Disable
0
1
0
Read/Write 0 = Enabled, 1 = Disabled
26
Current Profile
27
Current Profile Segment
0
15
0
Read Only
28
Profile Segment Remaining Time
0
15
0
Read/Write 1 = 0.1 Minute?
29
Starting Profile Number
0
15
0
Read/Write
30
Starting Segment Number
0
15
0
Read/Write
PID PARAMETERS
33
Proportional band 1
1
999(.9)° or
9999 (process)
700
Read/Write 1 = 1 Display unit
34
Integral time 1
0
9999
120
Read/Write 1 = 1 second
