Variable Area - Omron E5ZN Operation Manual

Variable Area

5-4

Variable Area

64
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 process values 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.
Variable type
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.
ch1 PV etc.
C0
C1
ch1 SP etc.
ch1 input
C3
type etc.
ch1 remote
C5
PV
ch1 remote
C7
PV mode
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
E5ZN
Microcomputer
Variable area
Data reading/writing
Address
0000 0001 0002 0003
C0
C1
C3
C5
C7
Variable
Not used
ch2 SP, etc.
Not used
Not used
Not used
Not used
Section 5-4
012C 012D 012E
ch2 PV etc.
Not used
ch2 input
type etc.
ch2 remote
Not used
PV
ch2 remote
Not used
PV mode
Not used