Pde Peer Data Exchange Function Block - Honeywell HC900 Reference Manual

Function Blocks

PDE Peer Data Exchange Function Block

PDE Peer Data Exchange Function Block
Description
The PDE label stands for Peer Data Exchange.
This block is part of the Communications categories.
Function
A communications function block that allows interconnecting controllers with Ethernet media and
networking devices communicate with each other.
It requires one block per controller; up to 32 controllers maximum. It supports up to
8 Read and 4 Write parameters.
The block does not support forcing, but will allow data writes to any if its inputs.
Inputs
EV1 through EV4 - [ON] - data value written per scan
WR1 through WR4 - Values to be written to the selected controller
Attention : The block does not support bit packing and single bit writing.
If the register is an integer type, the floating point input will be rounded up prior to the address register.
Outputs
RD1 through RD8 - last read value from the selected controller.
NO SCAN -
OFF = device is receiving updates from peer
NO CONN -
OFF = Good connection, Peer found.
254
ON = device is not receiving updates from peer
ON = cannot connect to peer device
HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07