cliu
90058ffdef
- New skill equipment with task modbus-station: line, station, scan type, points and connected items by quick load, tested against CI Server's own Modbus slave mirror (eqpmdcmem + eqpmdcslvtcp) - CI-Eng-Sample: section PLC1, station CIENG_PLC with write/read-back items, load/remove steps and mirror start/stop scripts - ISS-024: the TCP slave answers Open Modbus/TCP, not RTU (closed) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
119 lines
5.2 KiB
Markdown
119 lines
5.2 KiB
Markdown
---
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task: Modbus TCP station by quick load (line, station, scan type, points, items)
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version: R1.03
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source: IM 36K10L41-01EN §2, §3.1–3.2, §3.6–3.7; IM 36K10C10-01EN §4.1; practiced on CI-Eng-Sample 2026-09-30
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status: verified
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---
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# Modbus TCP station by quick load
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Uses the CI-Eng-Sample loopback station `CIENG_PLC` as the worked example (files in
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`examples/CI-Eng-Sample/`: `09_modbus_line_df.qli`, `10_modbus_station_df.qli`,
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`11_item_eqp_df.qli`, removal `80_`–`82_`). For a real device, replace the address, unit id,
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points and conversion settings. Works from a normal prompt while CI Server is running; use
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short relative file names.
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## 1. (Test only) CI Server as its own Modbus slave
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CI Server ships a Modbus slave "mirror" that needs no hardware:
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- `eqpmdcmem -n EQPMDCMEM`: slave memory (64K registers, 64K bits per unit id; input and
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holding registers are the same memory, as are coils and input bits). The name must be
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`EQPMDCMEM`: the TCP slave looks for it.
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- `eqpmdcslvtcp -n EQPMDCSLVTCP -p 5020`: Modbus TCP listener (default port 502).
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Started by hand from a normal prompt they run until logoff or CI Server restart. To start
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them with CI Server, an administrator copies `examples/CI-Eng-Sample/equipment/
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eqpciengslv_start.cmd` and `_stop.cmd` to `%TLS_ROOT_PATH%\tls\com`: `equipment_start.cmd`
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runs every `eqp*start.cmd` there.
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## 2. Line (`MODBUS_LINE_DF`)
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```
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@FIELDS
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NAME,DESCRIPTION,LINE_TYPE,EQUIPMENT_MAN,HEART_BEAT,TIMEOUT,DEAD_TIME,REPEAT_CONNECTION_DELAY
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@MODBUS_LINE_DF
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"CIENG_MB_LINE","CI-Eng-Sample Modbus loopback line","TCP/IP","EQPCIENG",100,3000,30,10
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```
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- `EQUIPMENT_MAN` = equipment manager process name, must start with `EQP`, ≤ 12 characters.
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- Leave `EQUIPMENT_NODE` out: it defaults to the local node (keeps files portable).
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- Loading it **creates** `tls\com\eqpcieng_start.cmd`, `eqpcieng_stop.cmd` and
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`tls\sup\eqpcieng.sup` (written by the CI Service, no admin rights needed) and **starts**
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`eqpmdc -n EQPCIENG` a few seconds later. Wait ~15 s before loading stations.
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## 3. Station, scan type, points (`MODBUS_STATION_DF`, `MODBUS_SCAN_TYPE_DF`, `MODBUS_POINT_DF`)
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```
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@FIELDS
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NAME,DESCRIPTION,LINE,PROTOCOL,LINE_1_DEVICE,SUB_STATION_ID,OUTPUT_METHOD,STATUS_ITEM,ON_SCAN
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@MODBUS_STATION_DF
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"CIENG_PLC","Loopback to CI Server Modbus slave (port 5020)","CIENG_MB_LINE","Open Modbus/TCP","localhost:5020",1,"On change and connect","CI-Eng-Sample.PLC1.COMM_OK",1
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@FIELDS
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NAME,DESCRIPTION,SCAN_INTERVAL
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@MODBUS_SCAN_TYPE_DF
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"CIENG_SCAN1S","CI-Eng-Sample 1 s scan",1000
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@FIELDS
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NAME,STATION,POINT,DESCRIPTION,IO_ADDRESS,EXTERNAL_RELATION,SCAN_TYPE,CONV_TYPE,BITS
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@MODBUS_POINT_DF
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"CIENG_PLC:SP","CIENG_PLC","SP","Setpoint, holding register 1","RO:1","Output","CIENG_SCAN1S","Binary",16
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"CIENG_PLC:PV","CIENG_PLC","PV","Read-back, input register 1","RI:1","Input","CIENG_SCAN1S","Binary",16
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```
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- `PROTOCOL`: `Open Modbus/TCP`, `RTU` or `Ascii`. The CI Server TCP slave only answered
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**Open Modbus/TCP** (with `RTU` every request timed out, `EQP-E-TCPRCVTMO`; ISS-024).
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- `LINE_1_DEVICE` `<host>[:<port>]`, default port 502. `SUB_STATION_ID` = Modbus unit id.
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- `STATUS_ITEM`: an existing Boolean item; 1 = communication good, 0 = bad, status 22
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OFFSCAN when off-scan. Load it before the station.
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- Points need `NAME` = `<station>:<point>` as well as `STATION` and `POINT`
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(without it: `DSS-E-PIDX_FST`).
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- Addresses: `DO:n` coil, `DI:n` input bit, `RO:n[,bit]` holding register, `RI:n[,bit]` input
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register (numbers from 1, not 40001/30001). `EXTERNAL_RELATION`: `Input`, `Output`,
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`Input + Output`. `CONV_TYPE`: `Binary`, `Linear` (with `ELEC_LOW/HIGH`, `PHYS_LOW/HIGH`),
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`Float` (`FLOAT_TYPE` Intel, swap words), `Digital`, … (L41 summary §3.3).
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## 4. Connect items (`ITEM_DF.STATION`, `POINT`)
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```
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@FIELDS
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NAME,DESCRIPTION,ITEM_REP,VALUE_FORMAT,STATION,POINT
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@ITEM_DF
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"CI-Eng-Sample.PLC1.SETPOINT","Setpoint written to holding register 1","Integer","99999","CIENG_PLC","SP"
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"CI-Eng-Sample.PLC1.READBACK","Read back from input register 1","Integer","99999","CIENG_PLC","PV"
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```
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## 5. Test
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```
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itmval -p -n CI-Eng-Sample.PLC1.SETPOINT -v 1234
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itmval -g -n CI-Eng-Sample.PLC1.READBACK
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itmval -g -n CI-Eng-Sample.PLC1.COMM_OK
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printf '3\n1\n-1\n' | eqpdbg 0 EQPCIENG # slave 1: scan status, line status, request statistics
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```
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Before the first good scan input items show `off` (offline) and status 13 NOT INIT.
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**Off-scan / on-scan** (`dssqld -m` with `NAME,ON_SCAN` = 0 or 1): off-scan sets the status
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item to 0 / status 22 OFFSCAN and freezes input items at their last value with the `off`
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flag; a value written to an output while off-scan reached the device after going back
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on-scan (output method *On change and connect*).
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## 6. Remove (reverse order)
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1. Items connected to points (`ITEM_DF` names).
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2. Points, then station, then scan type (one file, in that order).
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3. Line: this **stops** the equipment manager and deletes its start/stop scripts, setup file
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and `tls\sav` files.
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4. The status item and section with the other items.
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## Test system (2026-09-30)
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Full cycle on CI-Eng-Sample: loaded, `SETPOINT` 1234/4321/2468 and `CMD` 1/0 read back
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through Modbus on `READBACK`/`FEEDBACK`, off-scan/on-scan checked, removed (manager stopped,
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files deleted), reloaded from the sample files and re-tested: all 0 errors.
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