Hitachi NJI-350B 3.3 Performance Specifications

Chapter 3 Function and Performance Specifications
3-6
3.3 Performance Specifications
3.3.1 Calculation Specifications
The calculation specifications of the PLC are described below.
Model Name 10-point type 14-point type 23/28-point type
Type EH-D10DT
EH-D10DTP
EH-D10DR
EH-D14DT
EH-D14DTP
EH-A14DR
EH-D14DR
EH-A14AS
EH-A23DRP
EH-A23DRT
EH-D23DRP
EH-D28DT
EH-D28DTP
EH-A28DRP
EH-A28DRT
EH-A28DR
EH-D28DRP
EH-D28DRT
EH-D28DR
EH-A28AS
CPU 32-bit RISC processor
Processing system Stored program cyclic system
Basic instructions 0.9 µs / instruction
Control
specifications
Processing
speed Application instructions Several 10 µs / instruction
User program memory 3 k steps max. (FLASH memory)
Instruction
language
Basic instructions 39 types such as LD, LDI, AND, ANI, OR, ORI, ANB, ORB, OUT, MPS,
MRD, MPP, etc.
Operation
processing
specifications Arithmetic instructions
Application instructions
62 types (arithmetic, application, control, FUN command etc.)
Ladder Basic instructions 39 types, such as
Arithmetic instructions
Application instructions
62 types (arithmetic, application, control, FUN command etc.)
I/O processing system Refresh processing I/O
processing
specifications
External
I/O Maximum number of
points 10 points 126 points 135 points 140 points
Bit 1,984 points (R0 to R7BF) Internal
output Word 4,096 words (WR0 to WRFFF)
Bit 64 points (R7C0 to R7FF) Special
Word 512 words (WRF000 to WRF1FF)
Bit/word shared 16,384 points, 1,024 words (M0 to M3FFF, WM0 to WM3FF)
Number of points 256 points (TD + CU) *1 Timer
counter Timer set value 0 to 65,535, timer base 0.01 s, 0.1 s, 1 s (0.01s has maximum 64 points *2)
Counter set value 1 to 65,535 times
Edge detection 512 points (DIF0 to DIF511: Decimal)
+ 512 points (DFN0 to DFN511: Decimal)
Program system Instruction language, ladder diagram Peripheral
equipment Peripheral unit Programming software
(LADDER EDITOR DOS version/Windows® version, Pro-H)
Instruction language programmer and form graphic display programmer cannot
be used.
Maintenance
functions
Self-diagnosis PLC error (LED display): Microcomputer error, watchdog timer error, memory
error, program error, system ROM/RAM error, scan time monitoring, battery
voltage low detection, etc.
*1: The same numbers cannot be used with the timer counter.
*2: Only timers numbered 0 to 63 can use 0.01 s for their timer base.