SERIAL COMMUNICATIONS
39
the control that a new Preset 1 value is forthcom-
ing. The ASCII character “B” must precede the
new Preset 2 value. The ASCII character “C” must
precede the new Preset 3 value. After the 1 to 6
digits for the new preset are received, the ASCII
character “*” must be received to tell the control
that the end of the preset value has been received.
When the “*” is received, the new preset is auto-
matically entered.
Sample commands to change both Preset 1 and
Preset 2 via serial communications is shown in
Figure 33. Note that each block shown contains
the bit organization as indicated in Figure 31. A
minimum of 100 milliseconds must be allowed
between transmissions for proper operation.
The Baud rate of the incoming serial communica-
tions is the same rate as set for the outgoing com-
munications. Any serial data the control receives is
ignored if it is not either preceded by an “A”, “B” or
a “?”. The control ignores any decimal points
which are received during a transmission of a new
preset, but inserts the decimal point automatically
after the new preset has been entered upon
receipt of the “*”.
TRANSMITTING SCALE FACTORS
For Model 5886-1400, the Scale Factor can be
transmitted with the other values (see Figure 22).
When the Scale Factor is transmitted, the value is
preceded by the identifying label “SCA”, indicating
Scale Factor. A sample printout of all values from
a model 5886-1400 control is given in Figure 33.
Figure 33.
Sample Printout of Values
from a 5886-1400
RECEIVING SCALE FACTORS
For Model 5886-1400 the Scale Factor can be
received with the other values. In this case, the
Scale Factor must be preceded by an ASCII “S”.
The sale factor itself can be up to five digits long in
ASCII characters and followed by an ASCII “*” For
example, a scale factor of 5.0000 is transmitted as
“S50000*”.
PRINT ON RESET
The control may be programmed to print when
reset. Function code 92 is used to select this
mode. Print on reset does not occur when the con-
trol auto-recycles.
CNT
001567 (Count Value)
PS1
010000 (Preset 1 Value)
PS2
025000 (Preset 2 Value)
PS3
000000 (Preset 3 Value)
SCA
1.0000 (Scale Factor)
