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Variable Area Section 5-4
5-4 Variable Area
The section of memory in the Temperature Controller that holds the data to be
transmitted via communications is called the variable area. The variable area
is to read current PVs or read/write parameter settings.
The variable area is not used for operation commands or for reading Control-
ler attributes.
To specify the position of a variable in the variable area, use the variable type
and address.
The address is a 4-digit hexadecimal code. Each variable contains an eight-
digit value in hexadecimal. Negative values are expressed as the two's com-
plement. When the current value of a variable is read as 105.0 on the main
indicator of the Temperature Controller, for example, its hexadecimal notation
is read in the form 0000041AH (the decimal point is ignored; 105.0
→ 1050 →
0000041AH).
The variable area is mapped as shown below. The variable type is converted
to a 2-byte ASCII code and loaded to the frame. Available variable types are
shown in the following map.
Variable type C0: Read-only data for settings area 0 in double-word format
Variable type C1: Read/write data for settings area 0 in double-word format
Variable type C3: Read/write data for settings area 1 in double-word format
Variable type C5: Read/write data for settings area 0 in double-word format
Variable type C7: Read/write data for settings area 1 in double-word format
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Data reading/writing
E5ZN
Microcomputer
Variable area
Variable
0000 0001 0002 0003 013D 013E 013F
Address
C0
C1
C3
Variable type
C5
C7
Not used
Not used
Not used
Not used
Not used
ch1 PV etc.
ch1 SP etc.
ch1 input
type etc.
ch1 remote
PV
ch1 remote
PV mode
ch2 SP etc.
ch2 input
type etc.
ch2 remote
PV
ch2 remote
PV mode
Not used
Not used
Not used
Not used
ch2 PV etc.
0000
0001
0002
0003
0006
0007
0019
003E
001A
003F
0100
0101
0102
0103
0106
0107
0119
011A
013F
013E
C0
C1
C3
C5
C7
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