Installation manual

Option Parameters
900M050U00  Athena Controls, Inc. 14-7
14.5.4 Selecting the Parity When MODBUS is Used
Parameter Name
: Parity (see Note 1 below)
Name as Displayed
:
ParPar
Used By:
all
When Displayed:
if the card type is serial and the communication firmware
supports the MODBUS protocol
Choices:
nonenone none
OddOdd odd
eueneuen even
(see Note 2 below)
Default:
none
Description:
Used to select the type of parity to be used, if any.
Note 1: Because parity for Athena Plus protocol is included in the data format parameter
(D7), this parity parameter has no Athena Plus identification code.
Note 2: Regardless of the parity selected, a Series C controller that supports MODBUS
protocol always uses 1 start bit, 8 data bits, and 1 stop bit.
14.5.5 Selecting the Sequence for 32-bit IEEE Registers When MODBUS Is
Used
Parameter Name
: MODBUS IEEE Register Ordering
Name as Displayed
:
nnOdnnOd
Used By:
all
When Displayed:
if the card type is serial and the communication firmware
supports the MODBUS protocol
Choices:
YESYES MODBUS standard ordering: low register before high
nono non-standard ordering: high register before low
Default:
yes
Description:
Used to choose whether the two registers that make up a single
32-bit IEEE floating point value are transmitted in standard
MODBUS sequence (low before high), or not in standard
sequence (high before low)
If you are configuring MODBUS serial communications, you have
finished configuring the communication parameters. The
remainder of this section does not apply to your application
If you are using PID control, go to Section 16 for tuning.
If you are using on/off control, go to Section 17 for restricting
access.