User Guide

65
The NNPHR, NNMVR, NNTMR requests produce the fol-
lowing answer:
“NN<STX><ASCII string for a float>S<ETX>”
where S means “status” and can be equal to “A” (control and
alarm ON), “C” (control ON and alarm OFF), “N” (control
OFF).
The NNHOP request produces the following answer:
“NN<STX>C
1
C
2
C
3
C
4
<ETX>”
where C
1
C
2
are the ASCII representation of byte B
1
described
below (e.g. B
1
= 0xF3  C
1
= “F”, C
2
= “3”), C
3
C
4
are the
ASCII representation of byte B
2
described below (e.g. B
2
= 0x1D
 C
3
= “1”, C
4
= “D”). The meaning of B
1
and B
2
is:
B
2
bit 0 optional relay 2 (1: available; 0: not available)
B
2
bit 1 Digital Transmitter input
(1: available; 0: not available)
B
2
bit 2 PID control (1: available; 0: not available)
B
2
bit 3 free for future use (and set to 0)
B
2
bit 4 free for future use (and set to 0)
B
2
bit 5 free for future use (and set to 0)
B
2
bit 6 free for future use (and set to 0)
B
2
bit 7 free for future use (and set to 0)
B
1
bit 0 serial port (1: available, 0: not available)
B
1
bit 1 serial port type (0: RS485)
B
1
bit 2 analog outputs (1: available, 0: not available)
B
1
bit 3 second analog output (1: available, 0: not avail
able; no meaning if bit 2 = 0)
B
1
bit 4 optional relay 3 and relay 4
(1: available, 0: not available)
B
1
bit 5 hold digital output (1: available)
B
1
bit 6 4-20 mA input (1: available, 0: not available)
B
1
bit 7 relay 1,2,3,4 type (0: electromechanical)
The answer to the NNSTS command is:
“NN<STX>C
1
C
2
C
3
C
4
<ETX>”
where C
1
C
2
are the ASCII representation of byte B
1
described
below (e.g. B
1
= 0xF3  C
1
= “F”, C
2
= “3”), C
3
C
4
are the
ASCII representation of byte B
2
described below (e.g. B
2
= 0x1D
 C
3
= “1”, C
4
= “D”).