Siemens Moore 353 User Manual page 102

Function Blocks
LIL parameter will contain the LIL starting Chan (n) location. . The LOOP# must be entered to enable either
LIL or Modbus communications.
An operator display must be configured in order to properly map station loop data to network data. Sequencer loop
network data is mapped onto registers or coils when the standard Modbus interface is used and to
channels/parameters when the optional LIL interface has been added. Mappings for both Modbus and LIL are listed
in tables in the 'Network Communications' section.
Input CL controls local arbitration of changes to loop data from the network. When input CL is not configured, the
three status outputs LO (in 1.21 firmware this output was named L),, CN, and CM will be set high (1) and changes
can be made from a network command or the local faceplate. When CL is configured, it can be toggled locally
from a pushbutton switch, such as PB1SW (output PS), and will change from local to console or from
console/computer to local each time the input is toggled. Also, when output LO goes high, output CN will also go
high and CM will go low, indicating that the control source will change to Console whenever Local is disabled,
either by toggling input CL or from a network command. The Computer CM state can be set high using a network
command. The NL output will normally be connected to the MD input of the pushbutton block PB1SW to indicate
the C/L switch position on the operator faceplate using the green LED for C and the red LED for LO.
Output WD will go high (1) when the station fails to receive a Modbus network command within the watchdog
period. The watchdog time is set in the STATN (Station Parameters) function block.
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i|ware PC Faceplate Display
UM353-1
March 2003