Recipes

These examples are intended to be runnable as-is with environment variables.

Common Environment Variables

Variable	Default	Meaning
SLMP_HOST	127.0.0.1	PLC or mock server host
SLMP_PORT	1025	TCP/UDP port
SLMP_PLC_FAMILY	melsec:iq-r	melsec:iq-f, melsec:iq-r, melsec:iq-l, melsec:mx-f, melsec:mx-r, melsec:qcpu, melsec:lcpu, melsec:qnu, or melsec:qnudv
SLMP_TRANSPORT	tcp	tcp or udp
SLMP_TARGET	unset	SELF, SELF-CPU1, or NAME,NET,ST,IO,MD
SLMP_NETWORK / SLMP_STATION	unset	Other-station target, for example SLMP_NETWORK=1 SLMP_STATION=2
SLMP_MODULE_IO / SLMP_MULTIDROP	0x03FF / 0x00	Optional fields used with SLMP_NETWORK / SLMP_STATION
SLMP_TIMEOUT_MS	3000	socket timeout
SLMP_MONITORING_TIMER	16	SLMP monitoring timer
SLMP_ENABLE_WRITES	0	set 1 to enable write examples

Raw Read / Write

cd plc-comm-slmp-rust
SLMP_HOST=192.168.250.100 \
SLMP_PORT=1025 \
SLMP_PLC_FAMILY=melsec:iq-r \
cargo run --example raw_read_write

To enable write/read-back:

SLMP_ENABLE_WRITES=1 \
SLMP_WRITE_ADDRESS=D600 \
SLMP_WRITE_VALUES=111,222 \
cargo run --example raw_read_write

High-Level Named Helpers

cd plc-comm-slmp-rust
SLMP_HOST=192.168.250.100 \
SLMP_PLC_FAMILY=melsec:iq-f \
SLMP_NAMED_ADDRESSES='D100,D200:F,D50.3,LTN10:D,LTS10' \
cargo run --example named_helpers

To run the write helper too:

SLMP_ENABLE_WRITES=1 \
SLMP_NAMED_WRITE_WORD=D700 \
SLMP_NAMED_WRITE_WORD_VALUE=42 \
SLMP_NAMED_WRITE_FLOAT='D702:F' \
SLMP_NAMED_WRITE_FLOAT_VALUE=3.14 \
cargo run --example named_helpers

Type Name, Random, Block, Extended, Self-Test

cd plc-comm-slmp-rust
SLMP_HOST=192.168.250.100 \
SLMP_PLC_FAMILY=melsec:iq-r \
SLMP_RANDOM_WORDS='D100,R10' \
SLMP_RANDOM_DWORDS='D200,LTN10' \
SLMP_EXT_DEVICE='J1\W10' \
cargo run --example advanced_operations

Full Device Matrix Compare

This runs through the real-device matrix used during validation and checks that multiple read/write paths stay aligned on the same addresses.

cd plc-comm-slmp-rust
SLMP_HOST=192.168.250.100 \
SLMP_PORT=1025 \
SLMP_PLC_FAMILY=melsec:iq-r \
cargo run --example device_matrix_compare

This example exits non-zero when command routes disagree.

Target only a few devices while debugging:

SLMP_COMPARE_ONLY='LTS10,LTC10,LCS10,LCC10,LTN10,LSTN10' \
cargo run --example device_matrix_compare

Cross-Verify

Rust-only run:

cd ../plc-comm-slmp-cross-verify
python verify.py --clients rust

Full parity:

cd ../plc-comm-slmp-cross-verify
python verify.py

Live profile run:

cd ../plc-comm-slmp-cross-verify
python slmp_live_verify.py \
  --ip 192.168.250.100 \
  --port 1025 \
  --profile r120pcpu_tcp1025 \
  --include-stateful \
  --include-remote