NOVUS N120/N125 CONTROLLER User Manual

Page 13

0691

Psp1

Setpoint 1 of Program 1 (R&S)

Range: same as in psp0.

0692

Psp2

Setpoint 2 of Program 1 (R&S)

Range: same as in psp0.

0693

Psp3

Setpoint 3 of Program 1 (R&S)

Range: same as in psp0.

0694

Psp4

Setpoint 4 of Program 1 (R&S)

Range: same as in psp0.

0695

Psp5

Setpoint 5 of Program 1 (R&S)

Range: same as in psp0.

0696

Psp6

Setpoint 6 of Program 1 (R&S)

Range: same as in psp0.

0697

Psp7

Setpoint 7 of Program 1 (R&S)

Range: same as in psp0.

0698

Psp8

Setpoint 8 of Program 1 (R&S)

Range: same as in psp0.

0699

Psp9

Setpoint 9 of Program 1 (R&S)

Range: same as in psp0.

0700

Reserved

Internal use

1.4 STATUS WORDS

Register

Value format

Status Word 1

bit 0 – Alarm 1 (0-inactive; 1-active)
bit 1 – Alarm 2 (0-inactive; 1-active)
bit 2 – Alarm 3 (0-inactive; 1-active)
bit 3 – Alarm 4 (0-inactive; 1-active)
bit 4 – Input 0 – I/O 5 (0- inactive; 1- active)
bit 5 – Input 1 – I/O 3 (0- inactive; 1- active)
bit 6 – Input 2 – I/O 4 (0- inactive; 1- active)
bit 7 – Reserved
bit 8 – Hardware detection value
bit 9 – Hardware detection value
bit 10 – Reserved
bit 11 – Reserved
bit 12 – Reserved
bit 13 – Reserved
bit 14 – Reserved
bit 15 – Reserved

Status Word 2

bit 0 – Automatic (0- manual; 1- automatic)
bit 1 – Run (0-stop; 1-run)
bit 2 – Control Action (0-direct; 1-reverse)
bit 3 – Reserved
bit 4 – Auto-tune (0-no; 1-yes)
bit 5 – Alarm 1 power-up inhibit (0-no; 1-yes)
bit 6 – Alarm 2 power-up inhibit (0-no; 1-yes)
bit 7 – Alarm 3 power-up inhibit (0-no; 1-yes)
bit 8 – Alarm 4 power-up inhibit (0-no; 1-yes)
bit 9 – Unit (0-°C; 1-°F)
bit 10 – Reserved
bit 11 – Output 1 status
bit 12 – Output 2 status
bit 13 – Output 3 status
bit 14 – Output 4 status
bit 15 – Output 5 status

Status Word 3

bit 0 – Very low PV conversion (0-no; 1-yes)
bit 1 – Negative conversion after calibration (0-no; 1-yes)
bit 2 – Very high PV conversion (0-no; 1-yes)
bit 3 – Exceeded linearization limit (0-no; 1-yes)
bit 4 – Very high Pt100 cable resistance (0-no; 1-yes)
bit 5 – Self zero conversion out of range (0-no; 1-yes)
bit 6 – Self span conversion out of range (0-no; 1-yes)
bit 7 – Reserved
bit 8 – Reserved
bit 9 – Reserved
bit 10 – Reserved
bit 11 – Reserved
bit 12 – Reserved
bit 13 – Reserved
bit 14 – Reserved
bit 15 – Reserved

Table 2: Values of Status Words

Writing to an output bit is only possible if the output has no function assigned to it (the
output is configured to OFF in Alarm Cycle).

Coil Status

Output description

Output 1 Status (I/O1)

Output 2 Status (I/O2)

Output 3 Status (I/O3)

Output 4 Status (I/O4)

Output 5 Status (I/O5)

1.5

EXCEPTION RESPONSES – ERROR CONDITIONS

The MODBUS RTU protocol checks the CRC in the data blocks received. Reception
errors are detected by the CRC, causing the controller to discard the packet, not sending
any reply to the master.

After receiving an error-free packet, the controller processes the packet and verifies
whether the request is valid or not, sending back an exception error code in case of an
invalid request. Response frames containing error codes have the most significant bit of
the Modbus command set.

If a WRITE command sends an out-of-range value to a parameter, the controller will
clamp the value to the parameter range limits, replying with a value that reflects these
limits (maximum or minimum value allowed for the parameter).

The controller ignores broadcast READ commands; the controller processes only
broadcast WRITE commands.

Error Code

Error Description

Invalid Command

Invalid Register Number or out of range

Invalid Register Quantity or out of range

Table 3 – Exception response error codes