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CHAPTER 3 SPECIFICATIONS
3
3.4 Buffer Memory Assignment
3.4.2 Details of the buffer memory
(8) CH Set value (SV) monitor (Un\G25 to Un\G28)
Set value (SV) of each time unit set in CH Setting change rate limiter time unit setting (Un\G735, Un\G751,
Un\G767, Un\G783) is stored in this buffer memory area. ( Page 157, Section 3.4.2 (85))
The set value (SV) can be monitored in real time.
(9) Cold junction temperature process value (Un\G29)
The measured temperature of cold junction temperature compensation resistor is stored in this buffer memory
area.
Values to be stored
*1
vary depending on the temperature unit set in CH1 Input range (Un\G32). ( Page 96,
Section 3.4.2 (12))
• For other than : -10 to 100
• For : 14 to 212
*1 The operation of the Q64TCN is guaranteed in the ambient temperature of 0 to 55°C.
For the general specifications of the Q64TCN, refer to the following.
QCPU User's Manual (Hardware Design, Maintenance and Inspection)
(a) Usable modules
• Q64TCTTN
• Q64TCTTBWN
(10)MAN mode shift completion flag (Un\G30)
This flag is for checking completion of the mode shift when shifting AUTO (auto) mode to MAN (manual) mode.
The following values are stored in this buffer memory area.
• 0: MAN mode shift uncompleted
• 1: MAN mode shift completed
The following figure shows bits of the buffer memory area that correspond to each channel.
When shift to MAN mode is completed, bits corresponding to appropriate channel become MAN mode shift
completed (1).
(a) How to shift the mode
Shift the mode in the following buffer memory area.
•CH AUTO/MAN mode shift (Un\G50, Un\G82, Un\G114, Un\G146) ( Page 117, Section 3.4.2 (26)
)
(b) Setting manipulated value (MV) in MAN mode
Set the manipulated value (MV) in the following buffer memory area.
•CH MAN output setting (Un\G51, Un\G83, Un\G115, Un\G147) ( Page 118, Section 3.4.2 (27))
Set the manipulated value (MV) after confirming MAN mode shift completion flag (Un\G30) has become MAN
mode shift completed (1).
Common
Common
Common
b15
0
b14
0
b13
0
b12
0
b11
0
b10
0
b9
0
b8
0
b7
0
b6
0
b5
0
b4
0
b3
CH4
b2
CH3
b1
CH2
b0
CH1
Bit data from b15 to b4 are fixed to 0.