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sigmadue - IEC 61131-3 Function Block Library
32
1-3-24 HOLD VALUE
FB Prototype
HOLD_VALUE
Input parameters
Output parameters
Description
This FB has the functionality of a Sample and Hold circuit. It latches the value of
the analog input
AI
on the output
AOUT
, in correspondence of the rising edge of
the latch digital input
D_HLD
. When
D_HLD
is inactive, the value of the output
AOUT
is identical with the signal at the input AI, that is
AO = AI
. When
D_HLD
goes active, the
AOUT
output is latched and this value is hold until the
D_HLD
sig-
nal goes inactive again.
Default values
Label Type Description
AI REAL Input Value
D_HLD BOOL Hold Command
Label Type Description
AO UT REAL Function Block Output
AI
D_HLD
REAL
BOOL
¡
¡
REAL AOU
T
¡
Input Default values
AI 0.0
D_HLD FALSE
Output Default values
AO UT 0.0
- CU-02 & MP-01 1
- Ascon Tecnologic srl 2
- Chapter 1 3
- Chapter 2 4
- Chapter 3 4
- Introduction 7
- AsconACLib 9
- 1-3-1 ALARM_ABSOLUTE MODULE 11
- 1-3-2 ALARM_ADVANCED 12
- Chapter 1 - AsconACLib 13
- 1-3-3 ALARM_BAND MODULE 14
- 1-3-4 ALARM_DEVIATION MODULE 15
- 1-3-5 ALARM RATE 16
- 1-3-6 AVG_ADV_8REAL 17
- 1-3-7 AVG_MOVING 19
- 1-3-8 AVG_RUNNING 21
- 1-3-11 COMPARATOR 26
- 1-3-12 BYTE A/D CONVERTER 27
- 1-3-13 WORD A/D CONVERTER 28
- 1-3-14 DWORD A/D CONVERTER 29
- 1-3-15 BYTE D/A CONVERTER 30
- 1-3-16 WORD D/A CONVERTER 31
- 1-3-17 DWORD D/A CONVERTER 32
- 1-3-18 COUNTER 33
- 1-3-19 DIGITAL DECODER 34
- 1-3-20 DEW_POINT 35
- 1-3-21 F0_CALCULATION 36
- 1-3-22 FLIP FLOP D 38
- 1-3-23 FLIP FLOP JK 39
- 1-3-24 HOLD VALUE 40
- 1-3-25 HR_DRY_WET_BULB 41
- 1-3-26 IN BETWEEN 43
- 1-3-27 ANALOG LIMITER 44
- 1-3-28 MASS_FLOW 45
- 1-3-29 MIN MAX SELECTOR 47
- 1-3-33 MONOSTABLE PULSE 51
- DIN_1... DIN_16 57
- 1-3-39 RESCALE 59
- 1-3-40 SAMPLING_TIME 60
- 1-3-41 SLOPE LIMIT 61
- 1-3-42 TIMER_ADV 62
- 1-3-43 TOTALIZER 63
- 1-3-44 TOTALIZER_ADV 65
- AsconBasicIOLib 67
- Network standard 69
- 2-3-1 bDI16LV 70
- 2-3-2 bDI32LV 70
- 2-3-3 bDO04RL 71
- 2-3-4 bDO08RL 71
- 2-3-5 bDO04TX 72
- 2-3-6 bDO16TS 72
- 2-3-7 bDO16TP 73
- 2-3-8 bDO32TS 73
- 2-3-9 bDM08TS 74
- 2-3-10 aDM08TS 75
- Input_MS 76
- CH Input 76
- MS_TimeN 76
- Input Special 77
- Function 77
- 2-3-11 bDM16TS 79
- 2-3-12 bDM32TS 79
- 2-3-13 bAI02UI 80
- Chapter 2 - AsconBasicIOLib 81
- 2-3-14 bAI04RT 82
- 2-3-15 bAI08TC 84
- Input tables 85
- 2-3-16 bAI08HL 86
- 2-3-17 bAI08DP 87
- 2-3-18 bAO08HL 88
- 2-3-19 bAO08DP 90
- 2-3-20 bERRORSTATEAN 91
- NETWORK 92
- 2-3-21 bERRORSTATEDIG 93
- AsconControlLib 95
- 3-3 Function Block Decription 96
- DAM input TRUE 100
- PID calculation 100
- 3-3-2 S2_HC_CONTROLLER 101
- Description 102
- Chapter 3 - AsconControlLib 103
- Parameters 104
- DEADBAND 105
- Natural frequency 107
- STEP response 108
- 3-3-5 S2_TFUZZY 109
- 3-3-8 S2_HC_TFUZZY 112
- 3-3-9 S2_EZ_TUNE 113
- 3-3-10 S2_MV 115
- 3-3-11 S2_HCMV 117
- 3-3-12 S2_SPLITMV 119
- 3-3-13 S2_FILTER 121
- Chapter 4 122
- AsconCPULib 122
- SystemDirectVar.POE 123
- DevEmcySts Matrix 124
- 4-3-2 SPLIT_ENABLE 125
- 4-3-3 SET_TT (note) 125
- 4-3-4 SET_TT_MODULE (note) 126
- 4-3-5 RECOGNIZESIGMAIO (note) 126
- Chapter 5 127
- AsconMBCommLib 127
- SERIAL_PORTS/MP_SERIAL_PORT 129
- TCP_IP_PORT 129
- 5-2-2 Modbus Slave Protocol 130
- %MW - %MX 131
- MEMORY AREA 131
- DEDICATED TO MODBUS 131
- INTERFACE 131
- IEC 61131-3 PROGRAM 131
- 5-2-3 Modbus Master protocol 132
- Chapter 5 - AsconMBCommLib 133
- FB Prototype 134
- 5-3-2 Modbus MASTER COIL READ 135
- Rerefence 137
- 5-3-4 Modbus MASTER WORD READ 139
- 5-3-16 MB_SLV_RD8_DWORD 153
- 5-3-17 MB_SLV_RD8_REAL 154
- 5-3-18 MB_SLV_RD16_WORD 155
- 5-3-19 MB_SLV_RD32_DIGITAL 156
- 5-3-20 MB_SLV_RD_DIGITAL 157
- 5-3-21 MB_SLV_RD_DWORD 158
- 5-3-22 MB_SLV_RD_REAL 159
- 5-3-23 MB_SLV_RD_WORD 160
- 5-3-24 MB_SLV_WR8_DWORD 161
- 5-3-25 MB_SLV_WR8_REAL 162
- 5-3-26 MB_SLV_WR16_WORD 163
- 5-3-27 MB_SLV_WR32_DIGITAL 164
- 5-3-28 MB_SLV_WR_DIGITAL 165
- 5-3-29 MB_SLV_WR_DWORD 166
- 5-3-30 MB_SLV_WR_REAL 167
- 5-3-31 MB_SLV_WR_WORD 168
- 5-3-32 MODEM_CHECK 169
- 5-3-33 MODEM_CONF 170
- 5-3-34 MODEM_SMS_SEND 172
- 5-3-35 MP SERIAL Ports 174
- 5-3-36 PROFIBUS PORT 176
- ERR_CODE.4 Protocol Error 177
- ERR_CODE.5 Page Number Error 177
- Output Description 177
- 5-3-37 SEND_EMAIL 178
- 5-3-38 SERIAL Ports 181
- 5-3-39 SYS_OPRS_MNGT 183
- 5-3-40 TCP/IP Port 184
- Appendix A 185
- Reference documents 185
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