Emerson Keystone OM9, Installation & Maintenance Instructions Manual

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17
11 data exchange mode
the following paragraph describes the input and output messages of EPI
2
DPV1 interface when
working in ‘data exchange mode’ for ‘cyclic data’ and ‘acyclic data’. In all cases it is called ‘input
signal’ if data is sent from actuator to bus, vice-versa it is called ‘output signal’.
11.1 cyclic communications dpV0
11.1.1 Output data
the structure of cyclic output data is as follow depending on the module selected:
module 1 or module 3
byte b7 b6 b5 b4 b3 b2 b1 b0
0 reserved reserved reserved reserved reserved
stop
command close
command Open
command
module 2 or module 4
byte b7 b6 b5 b4 b3 b2 b1 b0
0 reserved reserved reserved reserved reserved stop
command
close
command Open
command
1 reserved reserved reserved reserved reserved reserved reserved Positioner
enable
2 set point
3 set point
command description position
Open command When this bit is set to 1 an open command is
issued to the actuator. the open command is
maintained for all the duration on the movement
since the receiving of the bus command until the
open limit has been reached. the open command
is reset when a stop command is received from
the bus. associated to output data
Module 1/3 or Module 2/4
byte 0; bit 0
close command When this bit is set to 1 a close command is issued
to the actuator. the close command is maintained
for all the duration on the movement since the
receiving of the bus command until the close limit
has been reached. the close command is reset
when a stop command is received from bus. associated to output data
Module 1/3 or Module 2/4
byte 0; bit 1
stop command When this bit is set to 1 a stop command is issued
to the actuator. the stop command received from
the bus causes the reset of both open and close
command. associated to output data
Module 1/3 or Module 2/4
byte 0; bit 2
Positioner enable When this bit is set to 1 it enables the on-board
positioner. the positioner is enabled as long as
this bit is set to 1. associated to
Module 2/4
byte 1; bit 0
set point the set point received from the bus is used to
produce the open or close commands to the EPI2
actuator as defined in paragraph 9.1.3: ‘Positioning
algorithm’. associated to output data
Module 2/4
byte 2 and 3
Keystone OM9 - EPI2 PrOfIbus DPV1 IntErfacE
InstallatIon & MaIntenance InstructIons