3.2
Data Communications with the Watlow Series 988 Family
Communications Setup, Chapter 3
Setup
Prompt Appears if… Range Factory
default
[bAUd] comms unit (Baud rate) [`300], [`600],
[1200], [2400], [4800], [9600] [9600]
[dAtA] comms unit [``7o] = 7 data bits, odd parity [``7o]
[``7E] = 7 data bits, even parity (see note)
[``8n] = 8 data bits, no parity
(Start bit = 1) (Fixed)
(Stop bit = 1) (Fixed)
[Prot] comms unit [FULL] = ANSI X3.28 2.2 - A.3 [FULL]
[``On] = XON / XOFF
[Mod] = Modbus (988 only)
[Addr] [Prot] = [FULL] 0 to 31 (ASCII) if [IntF] = [`485] [```0]
or 0 to 9 (ASCII) if [IntF] = [`422] [```0]
[Prot] = [Mod] 0 to 247 if [IntF] = [Mod] [```1]
[IntF] "S" hardware [`485] = EIA-485 Interface type [`485]
[`422] = RS-422 Interface type
TL
W
W
A
PROCESS
L1 L2 L3 L4
DEV
% OUT
DISPLAY
MODE
HOLD
RUN
SERIES 988
Figure 3.2 -
The Communications
Menu.
Setup at the Controller's Front Panel
• Press the < and > keys simultaneously for three seconds.
• The [SEt] prompt appears in the lower display.
• Press the < or > key until the [COM] prompt appears.
• Press the µ key to advance through the Communications Menu.
• Press the < or > key to select communications values from the table below.
• Document the setup parameters for each device on your network and label each
device.
• Press the ∂ key to exit.
Table 3.2 -
Communications
Menu Prompts and
Descriptions.
NOTE:
Selecting [Mod]
automatically sets
[dAtA] to [``8n].
[IntF]
[Addr]
[Prot]
[dAtA]
[bAUd]
[IntF] "U" hardware [`232] = RS-232 Interface type [`232]
[`485] = EIA-485 Interface type
[COM]
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