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T_, for example ` T_STEP1, T_PREV`UNIT_INSTRUMENT_SIGNAL
UNIT - the name of the plant, location, unit of equipment, etc., required to identify automation instrument in different groups of equipment
INSTRUMENT - identification of automation instrument according to the P&ID. If the P&ID provides a hierarchical name, the first part (prefix) can be placed in the position UNIT, the second (starting with the function letter) becomes the position ` INSTRUMENT`. You can use alternate outline characters instead of P&ID outlines. The framework does not regulate the rules of identification of instruments on diagrams, but it is recommended to use exactly those identifiers which are used in P&ID digrams.
SIGNAL - clarifying signal information, as the same instrument in the P&ID loop may have multiple inputs/outputs. Can be omitted if the tool has only one communication signal with the PLC.
Examples:
T101_TT1 - temperature TT1 in the tank T101
T101_TT1_PV - temperature TT1 in the tank T101 (alternative)
T101_LS1 - level indicator
T101_LSH - level indicator (alternative)
T101_TV1_CPOS - output to control the TV1 valve
T101_TV1_POS - current position of the TV1 valve
If a process variable is reserved for future use, it is recommended that it be named after the following templates:
REZDI1 - reserved type DIVAR
REZDI22 - reserved type DIVAR
REZAI1 - reserved type AIVAR
REZDO1 - reserved type DOVAR
REZAO1 - reserved type AOVAR
All suffixes for output signals must begin with the letter C, input signals must not begin with the letter ` C`
DI
ALM state Alarm, eg T101_TY1_ALM - frequency converter alarm
LSTP Local Stop Button Pressed
PWR Presence of power control circuit
RDY readiness of the device to work
RMT switch status local/remote
RUN The device is in operation
SCLS position is closed
SOPN position is open
SPDC contact of the discrete speed control sensor (eg inductive sensor)
WRN warning status
AI
ECUR Motor current
POS position of the valve body
PV current value
SPD Actual speed/frequency
DO
CBWR - Reverse (Motion Control)
CCLS - close control
CFRW - forward movement (movement control)
COPN - open or open/close control
CRMT - enable/disable remote control
CRVRS - Reverse Control, or Reverse/Stop
CSTRT - Control Start, or Start/Stop
CSTP - Stop control
CUP - Up command control
CDN - Down command control
AO
CSPD - setpoint speed/frequency
CPOS - setpoint position of the actuator
<– 1.4 General requirements for the implementation of the PACFramework interface
–> 1.6. The concept of classification and customization of objects