Omron Sysmac CJ Series, Operation Manual

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45
Data Exchange with the CPU Unit Section 2-5
3. If two or more Special I/O Units are assigned the same unit number, a
“UNIT No. DPL ERR” error (in the Programming Console) will be generat-
ed (A40113 will turn ON) and the PLC will not operate.
Initialization Data
Contents
The following table shows the specific applications of the bits and words in the
Initialization Data.
Note 1. Loops 3 and 4 are applicable to Temperature Control Units with four control
loops only. If a Temperature Control Unit with two control loops is being
used, the alarm mode and alarm hysteresis settings for loops 3 and 4 will
not be used and will be ineffective even if they are set.
2. The alarm modes can be set to “FF” to disable the alarms for the corre-
sponding loop. In this case, the loop’s control operation will stop and the
ERC Indicator will not light to indicate alarms.
For example, write “FFFF” to D (m+1) to disable loops 3 and 4.
Starting DM Area Word The starting DM Area word (m) for a Special I/O Unit is:
m = 20000 + (100
×
unit number)
Initialization Data
Details
The following table provides details of the Initialization Data settings. For more
details, refer to
2-6 Data Ranges . These words are output from the CPU Unit
to the Temperature Control Unit.
DM word Bit
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
D (m+0) Loop 1 Loop 2
Alarm 1 mode Alarm 2 mode Alarm 1 mode Alarm 2 mode
2
3
2
2
2
1
2
0
2
3
2
2
2
1
2
0
2
3
2
2
2
1
2
0
2
3
2
2
2
1
2
0
D (m+1) Loop 3 (See note 1.) Loop 4 (See note 1.)
Alarm 1 mode Alarm 2 mode Alarm 1 mode Alarm 2 mode
2
3
2
2
2
1
2
0
2
3
2
2
2
1
2
0
2
3
2
2
2
1
2
0
2
3
2
2
2
1
2
0
D (m+2) Loop 1: Alarm 1 hysteresis
D (m+3) Loop 1: Alarm 2 hysteresis
D (m+4) Loop 2: Alarm 1 hysteresis
D (m+5) Loop 2: Alarm 2 hysteresis
D (m+6) Loop 3: Alarm 1 hysteresis (See note 1.)
D (m+7) Loop 3: Alarm 2 hysteresis (See note 1.)
D (m+8) Loop 4: Alarm 1 hysteresis (See note 1.)
D (m+9) Loop 4: Alarm 2 hysteresis (See note 1.)
DM address Loop Setting Units
Word Bits
D (m+0) 12 to 15 Loop 1 Alarm 1 mode Set each loop’s alarm modes in BCD (0 to 9), as follows:
0: No alarm
1: Upper and lower-limit alarm
2: Upper-limit alarm
3: Lower-limit alarm
4: Upper and lower-limit range alarm
5: Upper and lower-limit alarm with standby sequence
6: Upper-limit alarm with standby sequence
7: Lower-limit alarm with standby sequence
8: Absolute-value upper-limit alarm
9: Absolute-value lower-limit alarm
The values written here are written to RAM.
08 to 11 Alarm 2 mode
04 to 07 Loop 2 Alarm 1 mode
00 to 03 Alarm 2 mode
D (m+1) 12 to 15 Loop 3 Alarm 1 mode
08 to 11 Alarm 2 mode
04 to 07 Loop 4 Alarm 1 mode
00 to 03 Alarm 2 mode