Specifications

Head Station STL-ETH1 (Ethernet) Ethernet
Quick Start Guide for the MELSEC STlite Series 4 - 13
● Encoder module STL-ENC
The Incremental Encoder Interface Module has a total of 6 bytes of user data in both the Input
and Output Process Image (4 bytes of encoder data and 2 bytes of control/status). The following
table illustrates the Input and Output Process Image, which have 4 words mapped into each
image. Word alignment is applied.
● Counter module STL-C100
The above counter module has a total of 5 bytes of user data in both the Input and Output Process
Image (4 bytes of counter data and 1 byte of control/status). The counter value is supplied as 32
bits. The following tables illustrate the Input and Output Process Image, which has a total of 3
words mapped into each image. Word alignment is applied.
Type of module Name ID number Description
Process Image [Byte]
Input Output
Encoder module STL-ENC 51205116
Input module for incremen-
tal encoder
66
Tab. 4-18: Process data of the encoder module
Input and Output Process Image
Description
Offset
Byte Destination
High Byte Low Byte
0 — C0/S0 Control/Status byte of Channel 1
1 D2 D1 Data value of Channel 1
2 — C1/S1 Control/Status byte of Channel 2
3 D3 D2 Data value of Channel 2
Tab. 4-19: Allocation of data for the encoder module STL-ENC
Type of module Name ID number Description
Process Image [Byte]
Input Output
Counter module STL-C100 51244881
Forward/reverse counter,
max. frequency 100 kHz
55
Tab. 4-20: Process data of the counter module
Input Process Image
Description
Offset
Byte Destination
High Byte Low Byte
0 — S Status byte
1 D1 D0
Counter value
2 D3 D2
Tab. 4-21: Input Process Image of the counter module
Output Process Image
Description
Offset
Byte Destination
High Byte Low Byte
0 — C Control byte
1 D1 D0
Counter setting value
2 D3 D2
Tab. 4-22: Output Process Image of the counter module