84
Specifications Section 2-1
Timer/Counter PV refresh 
method
CJ1-H and CJ1M CPU Units: BCD or binary (CX-Program-
mer Ver. 3.0 or higher).
CJ1 CPU Units: BCD only.
Programming Manual: 
6-4 Changing the 
Timer/Counter PV 
Refresh Mode
Input response time setting Time constants can be set for inputs from Basic I/O Units. 
The time constant can be increased to reduce the influence 
of noise and chattering or it can be decreased to detect 
shorter pulses on the inputs. 
10-4-6 I/O Response 
Time
Programming Manual: 
6-6-1 I/O Response 
Time Settings
Mode setting at power-up Possible (By default, the CPU Unit will start in RUN mode if a 
Programming Console is not connected.)
7-1-2 PLC Setup Set-
tings
Programming Manual: 
1-2 Operating Modes 
and 1-2-3 Startup Mode
Flash memory (CJ1-H and 
CJ1M CPU Units only)
The user program and parameter area data (e.g., PLC 
Setup) are always backed up automatically in flash memory. 
(automatic backup and restore.)
CPU Units with unit version 3.0 or later only: 
When downloading projects from CX-Programmer Ver. 5.0 or 
higher, symbol table files (including CX-Programmer symbol 
names, I/O comments), comment files (CX-Programmer rung 
comments, other comments), and program index files (CX-
Programmer section names, section comments, or program 
comments) are stored in comment memory within the flash 
memory.
---
Memory Card functions Automatically reading pro-
grams (autoboot) from the 
Memory Card when the 
power is turned ON.
Possible 3-2 File Memory
Programming Manual: 
SECTION 5 File Mem-
ory Functions, 5-1-3 
Files, and 5-2-2 CMND 
Instruction
Program replacement during 
PLC operation 
Possible Programming Manual: 
5-2-3 Using Instruction 
in User Program
Format in which data is 
stored in Memory Card
User program: Program file 
format
PLC Setup and other param-
eters: Data file format
I/O memory: Data file format 
(binary format), text format, 
or CSV format
Programming Manual: 
5-1 File Memory
Functions for which Memory 
Card read/write is supported
User program instructions, 
Programming Devices 
(including CX-Programmer 
and Programming Con-
soles), Host Link computers, 
AR Area control bits, easy 
backup operation
Programming Manual: 
5-2 File Memory Oper-
ations
Filing Memory Card data and the EM (Extended Data Memory) 
Area can be handled as files.
Programming Manual: 
SECTION 5 File Mem-
ory Functions
Debugging  Control set/reset, differential monitoring, data tracing (sched-
uled, each cycle, or when instruction is executed), instruction 
error tracing, storing location generating error when a pro-
gram error occurs.
Programming Manual: 
7-2 Trial Operation and 
Debugging
Item Specifications Reference