Submittal Sheet

7800 SERIES S7800A2142 KEYBOARD DISPLAY MODULE
33 32-00110—05
The Modbus parity can be edited by selecting the “Parity” line and pressing the right arrow or OK button (see Fig. 44). The
Modbus interface can be configured for one of the following parity types:
•Even parity
• Odd parity
• No parity (None)
The current parity setting is displayed initially when the page is entered.
Fig. 44. Modbus parity setup
The up and down arrow buttons are used to scroll through the parity choices on the edit line. The right and left arrow
buttons are used to tab to the save commands, “Yes” and “No”. When the input focus is on the save commands the up and
down arrow buttons scroll between “Yes” and “No”. When the parity choice is set to the value desired the “Yes” command is
selected and the OK button is pressed to commit the change. If the user decides not to save the displayed parity setting,
the “No” command is selected and the OK button is pressed. In both save command cases the control returns back to the
Modbus setup menu.
The Endian data order for 32-bit registers in the Modbus interface (designated by U32 in Format column of Table 16) can
be specified by selecting the “Endian order” line and pressing the right arrow or OK button (see Fig. 45).
Fig. 45. Modbus Endian order setup
The data order can be set to “Big-Endian” or “Little-Endian”. A Big-Endian setting is used when the Modbus response
provides the 32-bit data in the following order:
A Little-Endian setting is used when the Modbus response provides the 32-bit data in the following order:
Default setting is Big-Endian, but the current setting is displayed when the page is initially entered.
MOST
SIGNIFICANT
BYTE
LEAST
SIGNIFICANT
BYTE
MOST
SIGNIFICANT
BYTE
LEAST
SIGNIFICANT
BYTE