Melec C-875, Instruction Manual

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9-1. Command Table
The HEX code is for the case where all the x bits are set to 0.
D D D D D D D D HEX C0DE COMMAND NAME EXECUTION TIME ７ ６ ５ ４ ３ ２ １ ０
0 0 0 0 ００ PULSE COUNTER PRESET MAX 200ns × × × ×
0 0 0 1 ０１ PULSE COUNTER COMPARE REGISTER1 SET MAX 200ns × × × ×
0 0 1 0 ０２ PULSE COUNTER COMPARE REGISTER2 SET MAX 200ns × × × ×
0 0 1 1 ０３ PULSE COUNTER COMPARE REGISTER3 SET MAX 200ns × × × ×
0 1 0 0 ０４ PULSE COUNTER COMPARE REGISTER4 SET MAX 200ns × × × ×
0 1 0 1 ０５ PULSE COUNTER COMPARE REGISTER5 SET MAX 200ns × × × ×
0 1 1 0 ０６ DIFFERENTIAL COUNTER PRESET MAX 200ns × × × ×
0 1 1 1 ０７ DIFFERENTIAL COUNTER COMPARE REGISTER1 SET MAX 200ns × × × ×
1 0 0 0 ０８ DIFFERENTIAL COUNTER COMPARE REGISTER2 SET MAX 200ns × × × ×
9-2. PULSE COUNTER PRESET Command
COMMAND……… 00 Function : Initializes the count value of the PULSE COUNTER to
Ｈ
a specified value.
Execution sequence
Preset data is specified in COUNTER DATA1 PORT, COUNTER DATA2 PORT
(Note) COUNTER DATA1 and COUNTER DATA3 PORT.
PORT WRITE The order
may not
The contents of COUNTER DATA1 PORT to COUNTER DATA3 PORT are as follows.
COUNTER DATA2 be observed.
PORT WRITE DATA1 PORT DATA2 PORT DATA3 PORT
７ ０ ７ ０ ７ ０
D D D D D D
COUNTER DATA3      
PORT WRITE
COUNTER COMMAND PRESET DATA (0～FFFFFF )
Ｈ
00 WRITE
Ｈ
When preset data is negative, it is represented in 2's complement form.
Counter value is 0 at POWER ON/RESET.
・Setting example of preset data
PRESET DATA(decimal) DATA1 PORT DATA2 PORT DATA3 PORT
Ｈ Ｈ Ｈ
+8,388,607 7F FF FF
Ｈ Ｈ Ｈ
+10 00 00 0A
Ｈ Ｈ Ｈ
±0 00 00 00
Ｈ Ｈ Ｈ
-10 FF FF F6
Ｈ Ｈ Ｈ
-8,388,607 80 00 01
Note: Note that the DATA and COMMAND PORTs described in this chapter are special ports for the counters
and their port addresses are different from that of the DRIVE PORTs. For the port address,
refer to 4-1.