Appendix C
C-9
Special Responses:
A special response negates transmitted instruction.
N00
Power has been OFF
N01
Invalid command
N02
Checksum error
N02
Checksum error *( Correct checksum)* if setup eC enabled
N03
Instruction contains >80 characters
N04
Non-Printable Characters in instruction
N05
Invalid instruction length, check data fields
N06
Communication watchdog time-out
N07
Invalid data in instruction field
N08
Invalid module (analog v.s. digital)
N09
Power has been OFF, battery backed restart OK
N10
Local control function error
N11
Local control function error
N12
Local RS-232 port buffer full
ADDRESSES/ BAUD RATE/ PROTOCOL Setup:
There are two addressing modes, Offset and Variable; units are shipped in the Offset mode
where only
MC
the master unit control needs to be set and
MD
, MA,
E1
,
E2
, and
E3
are
automatically set as shown below:
00
H
MC
Master unit control functions
(display U0=
MC
)
40
H
MD
Master unit digital I/O function
(display U1=
MD
)
80
H
MA
Master unit analog I/O function
(display U2=
MA
)
C0
H
E1
1
st
expander digital I/O functions
(display U3=
E1
)
D0
H
E2
2
nd
expander digital I/O functions
(display U4=
E2
)
E0
H
E3
3
rd
expander digital I/O functions
(display U5=
E3
)
in the variable mode individual addresses are independent and can range from 00
H
to FF
H
(0-255)
Setups Via pushbutton
- Offset mode only
On application of power, the IOP flashes Go Go Go Go Go Flashing the pushbutton LED
once while the ‘ appears, places the unit in setup mode; the IOP then flashes U 0 M C H
HHH
P
P
,
the 2 digits after U0 is the Master Unit control Hex address
the 3 digits after H is the baud rate (divided by 100)
the 1 digit after the P is the communications protocol type (2 or 4 pass)
Digit values are changed by flashing the pushbutton LED as they appear; note in this
method only the
MC
value is set,
MD
, MA, and ED are automatically set 40h
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