Hours Run And Maintenance Interval; Process Image - WAGO 750-640 Manual

2.1.1.6.3.1

Hours Run and Maintenance Interval

The hours run meter's data contains the "up to now accumulated hours run" as
well as the set maintenance interval as shown below:
Offset
0x0000 Up to now accumulated hours run (seconds)
0x0004 Maintenance interval (seconds)
The relevant service flag is set when the number of "up to now accumulated
hours run" exceeds the specified maintenance interval for one switching
channel. The GET_SERVICE_FLAGS function is used to get the status of the
service flags.
2.1.1.7

Process Image

Using the RTC module 750-640, a 6-byte input and output process image
maximum can be transferred to the fieldbus coupler/controller via one logical
channel. The data received by the transmitter is stored in 4 input and output
bytes (D0 ... D3). 1 control byte (C) and 1 status byte (S) are used to control
the function call. 1 command byte (ID) is used to select and acknowledge the
function to be executed.
Attention
The representation of the process data of some I/O modules or their variations
in the process image depends on the fieldbus coupler/controller used. Please
take this information as well as the particular design of the respective
control/status bytes from the section "Fieldbus Specific Design of the Process
Data" included in the description concerning the process image of the
corresponding coupler/controller.
The input bytes constitute the memory area of the data to be transmitted by the
module. The data to be transmitted to the module is written into the output
bytes.
S
ID
D0
D1
D2
D3
WAGO-I/O-SYSTEM 750
I/O-Modules
Description
Input Data
Status byte
Function selection ID
Data byte 0
Data byte 1
Data byte 2
Data byte 3
750-640 [RTC Module]
Output Data
C Control byte
ID Function selection ID
D0 Control byte 0
D1 Control byte 1
D2 Control byte 2
D3 Control byte 3
• 17
Process Image
Length
4
4