GSE Scale Systems - 115
Chapter 15 Communications Technical Reference Manual
transmissions. Connections to either or both may be
made. However the transmitted data for the print port
RS-232 and 20 mA outputs cannot differ from each other
with regard to software protocall. The possible
connections for serial RS-232 is described in Table 12,
PRINT Port Connections.
Peripheral Inputs
The 574 permits up to two other peripherals to send
RS-232 data to it. These inputs to the 574 are barcode
scanners and external keyboards.
Both a TTL input and an RS-232 input are provided,
along with connections for +5 volts and ground. GSE
provides a cable which at one end will connect to the
PRINT port connector of the 574 and the other end will
provide the mating connector to the keyboard and
barcode scanners that GSE provides as peripheral
devices.
Communications Cables
1. Strip back the jacket of the communications
cable 7" for the J4 strain relief, and 8" for the
J2 strain relief.
2. Strip the insulation of each conductor back
1/4".
3. Twist the strands of each wire so that no
strands are loose. If desired, tin the wires to
insure the strands will not come loose. Use a
minimal amount of solder so that the wire will
fit into the connector.
4. Ground the shield to the casing of the
connector at only one end of the cable,
preferably at the 574 side.
5. The RS-232 ports and their functions are
shown in Table 11.
6. Solder each wire into its proper pin on the
DB9 connector for your chosen connection
configuration in Table 11 COMM Port or
PRINT Port.
15.4 Custom Transmit (Selections)
Parameter Setup
The Model 574 includes setup tables for four Custom
Transmits. The next group of parameters determine the
available selections for enabling these features.
P210.XX Send1
This parameter determines when the data specified by the
1st Custom Transmit is transmitted: P210.00 disables
transmissions; P210.01 enables transmissions when the
<PRINT> key is pressed; P210.02 selects a continuous
print function which will send a transmission each time
the display is updated (per P117); P210.03 will transmit
once per weighment (refer to P207).
P211.XX Port
This parameter determines which port the 1st Custom
Transmit data will be sent out, either the Print or Comm
Port.
P212.XX Mot'n
This parameter enables or disables motion delay on the
transmission. The selection of this parameter applies to
all selections for P210 above except for P210.03.
P220.XX Send2
This parameter selects when the 2nd Custom Transmit
will occur: P220.00 disables transmissions; P220.01
enables transmissions when the <PRINT> key is
pressed; P220.02 selects a continuous print function
which will send a transmission each time the display is
updated; P220.03 will send a transmission once per
weighment; P220.04 will let the operator designate
which transmission (1st-4th) to send when the <PRINT>
key is pressed. For the last selection, P220.04, if the
selections for P210, P220, P230 and P240 consist of both
"onreq" and "onreq2". When the <PRINT> key is
pressed in the Weigh Mode the prompt Send 1-4? will be
displayed. Pressing <1>, <2>, <3> or <4> will send the
corresponding Custom Transmit. Any other key entry
NOTE:
Transmissions received by the 574 through the
Comm port or from an external keyboard or a
barcode device are all or'd together inside the
indicator. Only one external device can be
sending data to the indicator at any one time.
Otherwise communications errors, garbled data,
and unpredictable results may occur! Care must
be taken in the implementation of these devices to
insure proper operation.
SECTION - 15.4
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