Zelio roof control

This is a roof module for Zelio Logic. To view and use it, you need to download Schneider Zelio logic editor. The editor runs under Linux on Wine - ask me for details if you cannot get it running.

The programme is designed for clam shell type roof with two halfs opening and closing, four end -of-path sensors and two motors. If your needs are different, please either help yourself or contact Petr Kubanek with questions. PLC has attached Ethernet modbus output - SR3NET01BD, which is used for PC-PLC communication. Please see description of registers at the end of the page.

There is a picture of front panel. In our experiences, nothing beats hardware switches when it comes to reliably block roof opening by staff, including not-so-computer maniacs. Cost of the switches, cables and box was about 1000 ZAR ~ 95 EUR. Cost of electronics inside (Zelio, ..) was about 500 EUR.

The programme has the following characteristics:

• auto/manual switch
• close/open switch for manual operation
• four switches for end-of-path control
• control for four motor relays - two per motor (open and close direction)
• attached ethernet module with dead-man button functionality (e.g. if PC stop responding, roof will close).
• rain button (when 1, it is not raining)
• configurable timeout for roof closing/opening
• configurable timeout for time between roof closing/opening (change of direction)
• independent operation of both roof halfs, governed by power sensing input (I9)
• any timeout (openign or closing) prevent roof from opening. Timeouts must be rested by pressing and releasing emergency switch, or by power cycling the unit. Roof can attempt close while in timeout.

• I1 Manual/Auto operation. If it is 1, roof is in auto operation. In auto mode, roof will not follow I2 for its operations. It will honest only commands provided by Ethernet controller.

• I2 Open/Close switch. Only active if roof is in manual mode, e.g. I1 is off. When on, roof will open, when off, roof will close.

• I3, I4, I5, I6 Inputs for end-of path switches. Please see provided description for details. When switch is engaged, e.g. roof is in given position, input shall be on. Left and right halfs descriptions can be changed on your will Left half opens first and closes as last.

• I7 Rain detector/bad weather. If weather is bad for observing, input is 0. If weather is favourable for observing, input is on.

• I8 Emergency stop. If engaged, emergency is declared and roof will stop all operations.

• I9 Power sensing. If 1, there is power in the grid.

• Q1,Q2,Q3,Q4 open and close motors relays. If one, given motor is command open/close.

• Q8 is engaged in emergency situation - e.g. when timeout is detected. It is reseted by pressing emergency stop or power cycling the unit.

• Q9 is extra switch, used for all-sky power cycle (1 - power to all sky cut)

• J1XT1 7 low bits are used for timeout control. So 127 seconds is maximal timout for roof control. The most significant bit - bit 16 - is used for weather override - if set to 1, roof will operate from computer even if it is raining. Bit 15 (4000) is used for control of Q9 switch.

• J2XT1 Dead man button control. Ethernet module must receive changing 0 and 1 s wiithin time specified in J1XT1. If 0 or 1 is not received, module will command roof to close. On model with compressor (see * in output description), 8 bits (8-15) are used for closing timeout control. Bit 16 is then a bit which override default roof value with value specified in bits 8-15.

• Q1XT1 State of right half of the roof.

• Q2XT1 State of left half of the roof.

• Q3XT1 Number of seconds remaining for dead man button engagement.

• Q4XT1 State of various emergency and other signals

Each output is threated as a bit value. Almost all bits are used to gain understanding of roof operations. The bits have following meanings:

1. 0001 not used
2. 0002 not used
3. 0004 state of end-of-path open switch
4. 0008 state of end-of-path close switch
5. 0010 not used
6. 0020 state of final block for opening
7. 0040 state of final block for closing
8. 0080 timeout during closing
9. 0100 timeout during opening
10. 0200 motor commanded opening
11. 0400 motor commanded closing
12. 0800 opening blocked
13. 1000 closing blocked

The device state (Q4XT1):

1. 0001 state of manual/auto switch
2. 0002 state of close/open switch.
3. 0004 timeout occured - emergency declared
4. 0008 power sensing (I9) - not pressent on compressor models
5. 0010 rain declared
6. 0020 compressor running - only on model with compressor
7. 0040 not used
8. 0080 not used
9. 0100 not used
10. 0200 not used
11. 0400 not used
12. 0800 compressor (B2) model *
13. 1000 weather state - 1 if weather is favorable for observing
14. 2000 ignore rain during opening - know problem of the opening on some domes. Is not present on compressor models.
15. 4000 emergency button pushed
16. 8000 state of deadman signal