Modbus Master - DANIEL 2500 User's Reference Manual

MODEL MODEL 2500_______________________________________________________ 2500_______________________________________________________
Open
Close

MODBUS MASTER

The MODBUS MASTER sub-menu, which is the ninth sub-menu on the MAIN
MENU, has a lower level sub-menu for defining two remote units. The remote unit
definition sub-menu provides for identifying or changing the remote name ID, the
communications address and state variable, and the control option for each of the
two remote units.
Name
Communications
Address
State
Control
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
SECTION 4 4 SECTION
Boolean variable that opens the valve when set
Boolean variable that closes the valve when set
Identifies the remote unit
Integer variable for the communications address of the
slave unit. If a communications address is not entered,
the default variable is zero. When the communications
address is zero, communications with the remote unit is
disabled.
Integer variable that contains the current MODBUS
function code transmitted and received for the remote
unit. The state entry provides a means of monitoring the
activity between the master and remote units.
conditions are also visible by means of this variable.
Three options available here are:
IDLE Indicating no communications in progress
ACTIVE Indicating communications in progress
FAULT Indicating failure to communicate with a
slave unit
Error
51