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Appendix F
E5@K Digital Controller Read Protocol
The E5@K Digital Controller Read Protocol reads and controls various parameters in remote mode for the
Controller connected to the Serial Communications Unit/Board via RS-232C or RS-485 cable.
Structure of the Protocol
The following table shows the structure of the E5@K Digital Controller Read Protocol.
Note 1. The hexadecimal equivalents of sequences numbers are given in parentheses.
2. Ladder Interface Settings
YES: User settings are required for the 3rd or 4th operands of PMCR.
NO: Send word allocation: Set the constant 0000 for the 3rd operand (S).
Receive word allocation: Set the constant 0000 for the 4th operand (D).
Sequence
No.
Communications sequence
name
Function Ladder interface
Send word
allocation
Receive word
allocation
000 (0000) Read process value Reads the process value. Yes Yes
001 (0001) Read set point during SP ramp Reads the set point during SP
ramp.
Ye s Ye s
002 (0002) Read MV Reads the MV (heating, cooling). Yes Yes
003 (0003) Read set point Reads the set point. Yes Yes
004 (0004) Read alarm value Reads alarm value 1, 2. Yes Yes
005 (0005) Read proportional band, integral
time, and derivative time
Reads the proportional band, inte-
gral (reset) time, and derivative
(rate) time
Ye s Ye s
006 (0006) Read cooling coefficient Reads the cooling coefficient. Yes Yes
007 (0007) Read dead band Reads the dead band. Yes Yes
008 (0008) Read manual reset value Reads the manual reset value. Yes Yes
009 (0009) Read hysteresis Reads the hysteresis (heating,
cooling).
Ye s Ye s
010 (000A) Read control period Reads the control period (heating,
cooling).
Ye s Ye s
011 (000B) Read SP ramp time unit and set
value
Reads the SP ramp time unit and
SP ramp set value.
Ye s Ye s
012 (000C) Read LBA detection time Reads the LBA detection time. Yes Yes
013 (000D) Read MV at stop and PV error Reads the MV at stop and the MV
at PV error.
Ye s Ye s
014 (000E) Read MV limits Reads the MV limits. Yes Yes
015 (000F) Read input digital filter Reads the input digital filter. Yes Yes
016 (0010) Read alarm hysteresis Reads the alarm 1, 2 hysteresis. Yes Yes
017 (0011) Read input shifts Reads the input shift limits. Yes Yes
018 (0012) Read level 0 parameters Reads parameters in level 0. Yes Yes
019 (0013) Read level 1 parameters 1 Reads parameters in level 1. Yes Yes
020 (0014) Read level 1 parameters 2 Reads parameters in level 1. Yes Yes
021 (0015) Read level 2 parameters 1 Reads parameters in level 2. Yes Yes
022 (0016) Read level 2 parameters 2 Reads parameters in level 2. Yes Yes
023 (0017) General-purpose read Reads the value of the specified
parameter.
Ye s Ye s
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