DCS

Of course, the following are some frequently discussed issues in the field of DCS (distributed control system). I hope they can be helpful to your manuscript.: 1. In the design of modern control systems, which one is better, DCS or PLC (programmable logic controller)? 2. How does the DCS system integrate process control and information management? 3. In the context of Industry 4.0, how does DCS integrate with Internet of Things (IoT) and cloud computing technology? 4. How to ensure the synchronization of the DCS system among various distributed control nodes? 5. How does the DCS system realize real-time transmission of data and instructions? 6. How to achieve refined and intelligent control through DCS system? 7. How does the DCS system handle hardware failures and system failures? 8. How is the application of DCS system implemented in electric power, petrochemical, metallurgy and other industries? 9. What is the future development trend of DCS systems? 10. How to improve the security and reliability of DCS system? These issues can be discussed in depth from various angles, with rich content without losing professionalism. .

Regarding the two recent projects of DCS and SIS, which method is better? Project one: A pneumatic valve actuator, a solenoid valve, the status enters DCS, and the solenoid valve operation enters SIS ； Project 2: A pneumatic valve actuator, two solenoid valves connected in series, the status enters DCS, and the operation enters DCS and SIS respectively.

The first one is slightly in line with the specification: All SIS signals enter the SIS system, and the SIS system communicates with the DCS for status monitoring.

This is what I wrote, please refer to 5 System Chapter 203 5Q001 Under what circumstances do you need to set up remote transmission instruments 203 5Q002 Under what circumstances do you need to set up alarms 203 5Q003 Under what circumstances do you need flow accumulation 203 5Q004 Under what circumstances do you need program control 203 5Q005 In the early stage of the project, you only know the number of equipment, how to estimate the instruments I.O Points 205 5Q006 Late Project I.O How to count points 206 5Q007 project I.O How points are distributed 207 5Q008 I.O Do you need redundancy? 207 5Q009 CHARM wiring method I.O Do you need redundancy? 208 5Q010 DCS cabinet installation conditions (remote I.O (with CHARM) 208 5Q011 Whether the operator station can be set up to be mobile or wireless 208 5Q012 How to determine the number of operator stations 209 5Q013 Does SIS need to set up a separate operator station? 210 5Q014 Is it necessary to set up an auxiliary console? 211 5Q015 What facilities does the auxiliary console generally include? 212 5Q016 How to set up the auxiliary console facilities 213 5Q017 Which alarms need to be sent to the auxiliary console 217 5Q018 What is the division of labor between SAT and FAT 218 5Q019 What content does SAT and FAT include 219 5Q020 How to determine the positive and negative effects in the control loop 220 5Q021 Whether there is experience value for PID tuning 220 5Q022 Whether the interlocking value should be used as the alarm value Error! Undefined bookmark. 5Q023 Whether the signal can be limited? 223 5Q024 The number of signals corresponding to the instrument 224 5Q025 What are the requirements for electric valves used in pump sequence control in Wanhua (ethylene project) 224 5Q026 How to set the electrical signal type 225 5Q027 Do electrical signals need to be isolated to DCS? 225 5Q028 Are there any guiding standards for alarm indicators? 226 5Q029 What is the quantitative relationship between alarms and operations (to be further studied) 227 5Q030 What types of alarms does the control system itself include? 228 5Q031 Should interlocking values be used as alarm values? 228 5Q032 How to do dynamic alarms/alarm suppression? 229 5Q033 How to quickly and roughly complete process alarm classification 229 5Q034 What requirements should the signal alarms implemented by the computer control system meet? 230 5Q035 Can bus, wireless and communication participate in safety interlocking? 230 5Q036 What are the commonly used international standards for computer control system communication? 231 5Q037 What are the commonly used interfaces for computer control system communication? 232 5Q038 The scanning cycle and 2s delay of monitoring points in the system 233 5Q039 What does the production operation operation screen include? 234 5Q040 The difference between DCS and SIS (excerpted from Haichuan) 235 5Q041 How to link GDS/DCS and CCTV 236 5Q042 Is it necessary to choose HIPPS in chemical projects 237 5Q043 In addition to the process conditions, what requirements need to be met in the interlocking logic diagram 238 5Q044 After the interlock triggers the final component action, does the series control valve need to be operated automatically? 238 5Q045 How to understand safety interlock and non-safety interlock 239 5Q046 The difference between Interlock and Trip (similar to safety interlock and non-safety interlock) (content excerpted from Haichuan) 240 5Q047 Is the interlock designed to be powered interlock or power-off interlock 242 5Q048 Does the interlock use positive logic or negative logic 243 5Q049 Does the bypass switch in the safety interlock use positive logic or negative logic 246 5Q050 Can BPCS and SIS share components (independence) 246 5Q051 Can the source points of DCS and SIS measuring elements be shared? 250 5Q052 Do intrinsically safe instruments with explosion-proof measures on site need to use safety/isolation barriers? 253 5Q053 Whether intrinsically safe instruments should be used in SIS? 253 5Q054 Whether signal distributors should be used in SIS? 254 5Q055 What does it mean that there are no more than two horizontal lines and no more than three vertical ones in PHA? 250 5Q056 In BPCS, can the same sensor/final component be used in different IPLs (unfinished) 251 5Q057 Can switching (DI) instruments be used as measuring instruments in safety instrumented systems? 254 5Q058 Under what circumstances will SIL0 instruments appear? 256 5Q059 Do redundant sensors in safety instruments have to use products of different technologies? 256 5Q060 How to understand instrument failure safety 257 5Q061 What are the reasons for PVBAD258 5Q062 In instrument design, what is the difference between choosing two out of three and choosing out of three?258 5Q063 How to understand the high demand and low demand modes of SIS259 5Q064 Is the more (safety) interlocking conditions the better260 5Q065 Can cascade logic stop be used in SIS260 5Q066 Does the feedback signal of the SIS valve enter the DCS or the SIS 260 5Q067 How does the non-SIS equipment act after the safety interlock is triggered261 5Q068 How to set the interlock reset261 5Q069 Can the software and hardware be shared or shared in the SIS262 5Q070 Can the final components of the SIS be manually intervened263 5Q071 Can there be SIS valves in the sequence control263 5Q072 Can the DCS valve in the sequence control be operated264 5Q073 Does SIL verification include reliability and availability264 5Q074 Does the interlocking system need to consider reset, bypass and other functions?264 5Q075 The difference between MOS and OOS264 5Q076 Do both MOS and OOS need to be set265 5Q077 What are the regulations during the bypass period of the safety instrument system?265 5Q078 Whether the selected structure in the safety interlock can be automatically degraded265 5Q079 Is it appropriate to set automatic MOS in the safety instrument system? 267 5Q080 Can emergency stop be bypassed? 268 5Q081 Can multiple SIL1s be considered to meet the requirements of SIL2? 268 5Q082 What is the difference between allowing startup and interlocking parking? 269 5Q083 Is the operating status, stop and other signals of the pump suitable for SIF? 269 5Q084 Is the frequency conversion of the centrifugal pump suitable for automatic control? 269 5Q085 Reply to the requirements of 6.1.b in YPU361 270 5Q086 Settings of the electrical manual automatic transfer switch 271 5Q087 Some commonly used electrical control schematics (not Wanhua practice) 272 5Q088 When the on-site manual automatic selection switch of the A loop pump is in the manual position, the interlock stop does not work, how to deal with it 273 5Q089 What is the difference between NPN and PNP 275 5Q090 Does SIS instrument signal failure trigger SIS interlock? 276 5Q091 Is the requirement for single-point interlocking reasonable (this article must be integrated with other articles) 277 5Q092 How do you view the treatment of single-point interlocking for equipment operation and maintenance? 280 5Q093 Three impulse control 287