Hardware manual

Chapter 2 Connection to a PLC
2-74
2.5.5 MELSEC-A1S/A2C (CPU)
Bit Device
Device Symbol
Device Name
HG PLC
Address Range
Read
/Write
Address
Gradual
Input Relay X X 0 - 1FF R
（*1）
Output Relay Y Y 0 - 1FF R/W
（*1）
Internal Relay M M 0 - 2047 R/W
Link Relay B B 0 - 3FF R/W
（*1）
Latch Relay L L 0 - 2047 R/W
Timer (contact) TS T 0 - 255 R
Timer (coil) TC T 0 - 255 R/W
Counter (contact) CS C 0 - 255 R
Counter (coil) CC C 0 - 255 R/W
Special Internal Relay SM SM 9000 - 9255 R
Annunciator F F 0 - 255 R/W