PD6830X Explosion-Proof Modbus Scanners
Instruction Manual
22
Master Mode (
MASTER
)
In Master mode, the scanner will poll up to 16 Modbus
registers in up to 16 Modbus devices. It will serve as a
Modbus network master; polling Modbus slave devic-
es for Modbus process variables (PVs) that can be
displayed or used in the math functions.
Programming the Modbus Master mode will include
defining the Modbus PV registers and devices, select-
ing the polling time interval, and the maximum re-
sponse time allowed.
PV Number Configuration (
PV NUM
)
The
PV Number
menu is used to enable and disable
each Modbus PV 1 to PV 16. The Modbus device and
registers are configured for each of the enabled PVs.
PVs that are not enabled will not appear in other pro-
gramming menus for display or inclusion in math
channel functions (CV).
PV1 to PV16 are programmed using identical menus.
•
To enable a PV it must be assigned to a specific
slave ID.
Enable/Disable PV
(
ENABLE
,
DISABLE
)
Enable or disable the Modbus PV. Disabled PVs will
require no additional configuration. Disabled PVs will
not be accessible in other menus or functions.
Slave ID (
SLAVEID
)
Enter the Modbus ID of the slave device that contains
the PV information.
Function Code (
FUNCODE
)
Select the Modbus function code necessary to read
the device. Use the
Up
and
Down
arrows to select
the appropriate function code, and press
Enter
to
accept the function code.
See the
PD6830X Modbus Register Table
available at
for more information on function
codes.
